Babolat wasn't picky in my case, as although I had worn through the main outsole layer, the black spot you see exposed was not the insole... kind of the middle layer (soft rubber) between outsole and insole, but that was enough for me to get the replacements.
B6 definitely has a longer break-in, while the PP's have a more adjustable fit (I really like the footbelt tech), allowing for a more-perfect fit (which you can change on the fly as needed). Both grip the court well and have solid outsole durability, but again I prefer the Babolat rubber for both grip and durability overall too.
Head Pro Tour 280/630. Tour Bite 18/Mosquito Bite. Sampras serve, Agassi backhand and Federer forehand. heh heh