1) Three degrees of freedom (versus 6 with LP-ESP)
2) Made of cobalt-chrome end plates instead of titanium
3) Keel design may help keep in place initially, but I would prefer not to have A-P slices made in my vertebrae. (Especially since I need two levels and would therefore have a keep cut on both sides of my L5 vertebrae)
4) Wear rates (debris ejected)... (Although the ESP and other elastomer discs will leach out some plastic chemicals over time and it is a legitimate concern in my opinion - but we already digest so much plastics that get into our food supply so not sure it's worth obsessing over.)
As far as the major ADR surgeons in Europe - most have implanted the ProDisc I imagine at one time or another. But they've moved on.
https://www.youtube.com/watch?v=BKaZYjXgsBc
Just one example.