I'm willing to chip in here a little.
I'd agree that for the new drivers, bodies don't make too much of a difference, but I would try and steer them towards soemthing with safe handling, like the Dodge2.
But when you get to a higher level... which i feel I'm slowly approching... they do make a difference. For example the other weekend I was practising at Ashby for the TORC series round there, and compared my Mazda6 and Dodge3.
For me the mazda gave more initial steering, but seemed to not want to rotate as quickly through the corner, whereas the dodge, whilst lacking a little initial steering, rotated much better mid turn.
I ended up running the Dodge 3 for most of the meeting in the end, I do like the way it handles.
Of course such a test is pointless if you adjust your car setup at the same time...
Only way to ever tell the differences between shells is to do back to back tests.
On another note, at the moment I'm refusing to use the Ride style bodies... to me they just don't look right proportionaly to me, with the pickup truck boot...
(also, there not BRCA legal over here, so not much point)
Maybe in the future I'll be swayed, but for now... PF all the way