You don't have positive G all the way around in an aileron roll.

In a properly done aileron roll you certainly do...

Were you thinking of a slow roll?

I know the diffference between a slow roll and an aileron roll.

If you think you maintain positive G in an aileron roll,

(1). Take along a bottle of water and a drinking glass next time you
fly.

(2). Fill the glass with water and place it atop the instrument
panel.

(3). Do an aileron roll.

vince norris