Remember the 60 degrees of bank equals two Gs is in
level flight at constant airspeed. You can easily roll to 80 degrees pulling very little G by giving up altitude or attitude. At one time we were allowed to do 90 degree banks in the UH-60 Blackhawk, and inverted flight happened (unintentional of course
though lovely wing-overs resulted). You cannot maintain altitude with 90 degrees of bank (well..., actually... you can in some aerobatic airplanes by using the fuselage as an airfoil...but I digress ) which apparently some Army Pilots couldn't grasp...besides it was driving Safety Officers crazy to see pilots having fun flying...
An aileron roll is about a 1.2 G maneuver because you start with 30 degrees pitch up and 1 G and end with zero degrees pitch up going thru 360 degrees of bank.... A slow roll experiences negative Gs as it is a constant pitch attitude/altitude maneuver...it is significantly harder to do well than an aileron roll.