Powerglide is definitely different, but at the same time the wings dont change so much as just fold out of the way. and a figure I do like a lot and for a plane former does have a pretty clean Vehicle mode.
RtS Lugnuts wings actually become the arms of the robot.
Terradive is also excellent but again the wings do just fold out of the way, rather than becoming a functional part of the robot mode. very good approximation to the Russion Su-47 I think.