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Ninja FlexFlame Propane Grill vs Napoleon Rogue PRO-S 425 Gas Grill

Buy the Napoleon Rogue PRO-S 425 if you want a versatile, well-built grill with an infrared sear side burner and a rear rotisserie burner. Buy the Ninja FlexFlame if you want one unit that also smokes and can run off a standard outlet. The Napoleon wins on build, ignition and heat control, and its 4.7 rating from 74 owners backs that up. The Ninja trades some grill refinement for a wider set of cooking modes.

  • Choose the Ninja FlexFlame if you want a single outdoor cooker that grills and smokes, and you value a long 10-year warranty over a dedicated sear station.
  • Choose the Napoleon Rogue PRO-S 425 if you want strong searing, rotisserie capability and battery-free ignition in a stainless build that owners rate highly.

Prices

  • Ninja FlexFlame Propane Grill: $1,079.99 at Walmart (last seen Nov 9)
  • Napoleon Rogue PRO-S 425 Gas Grill: $1,237.27 at Chadwicks & Hacks (last seen Nov 10)
  • Difference: the Ninja FlexFlame Propane Grill is $157.28 cheaper than the Napoleon Rogue PRO-S 425 Gas Grill at the latest prices (Nov 9 and Nov 10)
Ninja
Ninja FlexFlame Outdoor Cooking System Propane Grill

Ninja FlexFlame Propane Grill

Ninja FlexFlame Outdoor Cooking System Propane Grill

$1,079.99at WalmartChecked Nov 9
See all prices and details
Visit Walmart
Pros
  • Grills and smokes in one unit
  • Long 10-year warranty
  • Cast iron cooking surface holds heat
  • Runs on propane with a 120V assist
Cons
  • Heavy at 130 lb and 60 inches wide
  • No infrared sear or rotisserie burner
  • Needs an outlet for its powered features
Napoleon
Napoleon Rogue PRO-S 425 Freestanding Gas Grill With Infrared Side And Rear Burners

Napoleon Rogue PRO-S 425 Gas Grill

Napoleon Rogue PRO-S 425 Freestanding Gas Grill With Infrared Side And Rear Burners

4.7(74 ratings)
$1,237.27at Chadwicks & HacksChecked 7 h ago
See all prices and details
Visit Chadwicks & Hacks
Pros
  • Infrared side burner sears hard and fast
  • Rear infrared burner for rotisserie
  • JETFIRE ignition needs no batteries
  • SafetyGlow knobs show when gas is on
  • Folding shelves and locking casters
Cons
  • No smoker mode
  • Smaller primary grate than the total area suggests
  • Stainless shows fingerprints and smudges

What separates them

Ninja FlexFlame Propane GrillNapoleon Rogue PRO-S 425 Gas Grill
Cooking modes5-in-one, including a smoker functionGrill, infrared sear and rear rotisserie
Sear and rotisserieNo dedicated infrared sear or rear rotisserie burnerInfrared side sear burner plus infrared rear rotisserie burner
Main cooking area424 sq. in.425 sq. in. primary, 716 sq. in. total with warming area
IgnitionStandard ignitionJETFIRE battery-free ignition
Cooking gratesCast iron7.5 mm porcelainized cast iron WAVE grids
Power sourcePropane plus 120V power, 670 wattsPropane only, no outlet needed
Build and finishGreen painted body, silver finish, 130 lbStainless steel with folding side shelves
Warranty10 yearsStandard Napoleon limited warranty

Price history

$1,569.23$1,079.99
Nov 1Nov 11
  • Ninja FlexFlame Propane Grill: lowest $1,079.99 on Nov 9 at Amazon; $1,199.99 on Nov 11.
  • Napoleon Rogue PRO-S 425 Gas Grill: lowest $1,569.23 on Nov 11 at Amazon.

Prices at every store

Ninja FlexFlame Propane Grill

  • WalmartNew

    In stock

    $1,079.99Free shippingChecked Nov 9
    Visit Walmart
  • Best BuyNew

    In stock

    $1,079.99Free shippingChecked Nov 9
    Visit Best Buy
  • SharkNinjaNew

    In stock

    $1,199.99Free shippingChecked 7 h ago
    Visit SharkNinja
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $1,079.99Free shippingChecked Nov 9
    Visit Amazon

Store links may earn us a commission. Some prices via Klarna.

All 11 stores and price history →

Napoleon Rogue PRO-S 425 Gas Grill

  • Chadwicks & HacksNew

    In stockPriced in CAD (CA$1,749.00)

    $1,237.27Checked 7 h ago
    Visit Chadwicks & Hacks
  • All Things BarbecueNew

    In stockReturn policy

    $1,549.00Checked Nov 9
    Visit All Things Barbecue
  • Shop Backyard GrillsNew

    In stockReturn policy

    $1,579.00Checked 7 h ago
    Visit Shop Backyard Grills
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $1,569.23Free shippingChecked 7 h ago
    Visit Amazon
All 28 stores and price history →

Specs compared

SpecNinja FlexFlame Propane GrillNapoleon Rogue PRO-S 425 Gas Grill
Weight59 kg—
Voltage120 volts—
Wattage670 watts—
Warranty10 years—
Temperature range200°F-600°F—
Cooking modes5-in-one—
Main cooking space424 sq. in.—
Amperage15 amps—
With SmokerYes—
Gas TypePropane Gas—
FinishSilver—
Width60″ wide—
Show all 26 specsShow fewer specs
SpecNinja FlexFlame Propane GrillNapoleon Rogue PRO-S 425 Gas Grill
Number Of Burners3 burners—
Cooking FunctionsSmoker—
ColorGreen—
Height (")48.3—
Material Cooking SurfaceCast Iron—
Depth (")25.1—
Weight (lb)130.0—
Fuel type—Propane
Main burners—3 Main Burners
Main cooking area

What reviewers say

Napoleon Rogue PRO-S 425 Gas Grill

  • 4.7 / 574 ratings

Owners give it high marks for even heat, fast ignition and the rotisserie and sear burners. Complaints center on the small main cooking area and the hot, touchy infrared side burner.

What people mention
  • Heat controlPraisedOwners say the three main burners hold steady, even temperatures across the grate.
  • IgnitionPraisedThe JETFIRE system lights burners on the first push without batteries.
  • RotisseriePraisedThe infrared rear burner roasts whole chickens and joints evenly.
  • Side burnerMixedIt sears hard, but owners say it runs very hot and needs close watching.

Questions and answers

Which is better for smoking?
The Ninja FlexFlame, which has a dedicated smoker function. The Napoleon is built around grilling, searing and rotisserie, not low-and-slow smoking.
Which sears a steak better?
The Napoleon. Its infrared side burner reaches very high heat for a fast crust, and the dual-level sear plates reduce flare-ups. The Ninja relies on its main burners.
Which lasts longer?
The Napoleon's stainless steel body and 7.5 mm grids point to longer service life. The Ninja backs its build with a 10-year warranty, which is the stronger written guarantee.
Do I need an outlet for either grill?
Only the Ninja. It draws 120 volts at 15 amps for its powered features. The Napoleon runs on propane alone.
Is the Napoleon worth stepping up to?
Yes if you want rotisserie, a sear station and battery-free ignition. Skip it if smoking matters more than searing.
Which is easier to move?
The Napoleon, with folding side shelves and locking casters. The Ninja is 130 lb and about 60 inches wide, so plan a fixed spot for it.

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More comparisons

  • Lynx Sedona 42 Inch Freestanding Natural Gas Grill L701PSF-NG vs Napoleon Rogue PRO-S 425 Freestanding Gas Grill With Infrared Side And Rear Burners
  • Ninja FlexFlame Outdoor Cooking System Propane Grill vs Lynx Sedona 42 Inch Freestanding Natural Gas Grill L701PSF-NG

Buying guides that pick them

  • Best outdoor gas grills
—
23 1/4-inches by 18-inches (60.325 cm by 45.72 …
Ignition—JETFIRE Ignition
Cooking grates—Porcelainized cast iron cooking grids
Side burner—Infrared Side Burner
Rear burner—Infrared Rear Burner