To me, playing rhythm just doesn't show what P90s can do... They have a clearer top end than buckers but still they don't stand out.... Heat the amp up and do a bend and to me the difference becomes a bit obvious, especially with the amp cranked....
When a young ass teen, late big bros road band had two guitarists, both played Goldies...a 69 Deluxe w/ minis and a 57 with P90s..... Both through the Traynor Twins from hell, one combo w/ external cab, other was the head version with external.... Both mondo badass players (57 player owns studio near Nash now, degreed in classical gtr perf)... Even then, listening to those two wail all the damn time and playing both guitars any time I wanted, there was no comparison to be confused when going sailing on those guitars... Obvious.... especially snatching a bend lower on the neck....
To me, in my dumbass redneck opinion, with no tangible proof, nor give a shit if any agree/disagree, a bend on a P90 vs a Bucker is different. Magnet? Coil dimensions? Poles? GPS of poles to coil dimensions through bend travel? Who the hell knows. There is a difference... I heard it every time I played em... Another bud brought his 52 in the shop all the time back then and I'd play it when I worked there after school... same thing as the 57..... Snatch a bend and it sounded like you lost no fat during the bend vs bending on a bucker the content seems to change during bend travel... Do a bend on third or fourth fret on one of your buckers on each string and then do the same on your special through the same amp same settings. Towards the nut makes it even more obvious to me...