Which is better for a guard who cuts a lot?

The Kobe 8 Protro Halo. It is lighter and sits lower, so direction changes feel quicker. The Kobe 6 gives more forefoot spring but a bit more shoe underfoot.

The Kobe 6's more structured upper and rubber outsole tend to hold up better for outdoor or heavy use. The 8's mesh upper and white finish wear faster.

Is the Kobe 6 worth stepping up to over the 8?

If you want forefoot Zoom Air and a tighter upper, yes. If you want the lightest, lowest ride and a clean white shoe, the 8 is the better fit.

Can I wear either casually?

Both work off court. The triple-white 8 is the cleaner lifestyle look; the 6 stands out more with its snakeskin texture and bright colorways.

Do they fit the same?

Both run true to size for most players. The Kobe 6's more structured upper feels snugger, so wide feet may prefer the 8.

Nike Kobe 8 Protro vs Nike Kobe 6 Protro

The Kobe 8 Protro Halo is the lighter, lower-feeling shoe with a full-length React midsole and a clean triple-white look. The Kobe 6 Protro pairs a forefoot Zoom Air unit with Cushlon foam and a grippier, more textured upper. Owners of both praise the low, court-feel ride; the 8 is the better pick for pure speed and casual wear, while the 6 suits players who want a bit more forefoot spring and a more locked-in upper.

Choose the Kobe 8 Protro Halo if you want the lightest, lowest ride and a clean all-white shoe that works on court and off.
Choose the Kobe 6 Protro if you want forefoot Zoom Air, a more structured upper and a bolder colorway.

Prices

Nike Kobe 8 Protro: $178.98 at michaels.com (checked today)
Nike Kobe 6 Protro: $159.00 at GOAT (last seen Nov 8)
Difference: the Nike Kobe 6 Protro is $19.98 cheaper than the Nike Kobe 8 Protro at the latest prices (Nov 8 and Nov 9)