MotoGP 07 published by Capcom is Milestone work as it is SBK 07 and SBK 08 and the wonderful Super-Bikes Riding Challenge.
I don't like the Namco one's but the Milestone games are the best for me. Remember the SBK 2000 and SBK 2001 for PC those were Milestone work too and they are to this date some of the best moto-bike simulation that a comun mortal can buy.
Polyphony TT bike is good but not as good as the Super-Bikes Riding Challenge that fit the same gender.
Now SBK 07 (ps2) and SBK 08 (ps2) I prefer the SBK 08, the not yet released SBK 08 (ps3) is the best thou, lolol
About MotoGP I go with the MotoGP 07.
But for me Super-Bikes Riding Challenge is the best console/PC moto-bike game lots of content and great gameplay.