Which is better for painting and ceiling work?

The HBTower 5-step reaches higher and its tool tray holds paint and tools. The Flip-N-Lite suits lower work where a stable platform matters more than height.

Which is easier to carry around the house?

The Flip-N-Lite. Its aluminum frame is much lighter than the 27.2 lb steel HBTower, and it folds flat for storage.

Which holds more weight?

The HBTower lists 500 lb, though its own description also says 330 lb. The Flip-N-Lite is rated 300 lb Type 1A.

Is the Flip-N-Lite worth stepping up to?

If you want one-hand setup, a square standing platform, and light weight, yes. If you need height and capacity, the HBTower is the better fit.

Which is safer on hard floors?

Both have non-slip feet. The HBTower wraps its feet in rubber to protect floors; the Flip-N-Lite has non-marring, non-slip treads.

Little Giant Flip-N-Lite M6 vs HBTower 5-Step Folding Ladder

Buy the Little Giant Flip-N-Lite for one-handed setup, a square standing platform, and a light aluminum frame that folds flat. Buy the HBTower 5-step if you need more height, a higher load rating, and a steel frame with a tool tray. Reviewers call the Flip-N-Lite light and sturdy; the HBTower earns solid ratings but weighs 27.2 lb and is bulkier to move.

Choose the Little Giant Flip-N-Lite if you want a light, one-hand-folding platform ladder for household and light jobsite use.
Choose the HBTower 5 Step Ladder if you need a taller, heavier-duty steel ladder with a large tool tray for painting and repairs.

Prices

Little Giant Flip-N-Lite M6: $149.56 at eBay (last seen Nov 8)
HBTower 5-Step Folding Ladder: $128.22 at eBay (checked today)
Difference: the HBTower 5-Step Folding Ladder is $21.34 cheaper than the Little Giant Flip-N-Lite M6 at the latest prices (Nov 8 and Nov 10)