http://psp.ign.com/articles/693/693333p3.html
EDIT: About the tweaked difficulty from the EU version:
IGN said:9.0 Presentation
Super polished, almost total lack of bugs. Nice menus, style and sound.
9.0 Graphics
Some of the best visuals on the system. Fluid animation and crisp FMV.
8.5 Sound
Great voice work, tunes and sound effects. No complaints.
8.0 Gameplay
A great idea marred by a few glitches. Still fun, unique and very rewarding.
8.5 Lasting Appeal
Unlockable tracks, art, movies and more. No multiplayer, though.
8.4 Overall
And it's good!IGN said:Closing Comments
Pursuit Force is a damn fine portable game. Its fast, fun and perfectly suited for gaming on the run. It packs a ton of content, too, and it does so with style to spare. Race fans will definitely want to check it out, and so will fans of the action genre. But regardless of gaming preference, its hard to deny the appeal. Its a great idea with good execution. Sure, its not perfect, but no game really is. The gaming populace needs more games like Pursuit Force well-designed, original titles that just happen to play great whether waiting for the bus or sitting at home. Highly recommended.
EDIT: About the tweaked difficulty from the EU version:
IGN said:Having said that, Pursuit Force is not a forgiving game.
Yes, developers have tweaked it a bit to make certain missions a little friendlier, but it's still a decidedly "hardcore" game. Anyone who tinkered with the European release knows exactly how irritatingly difficult this game can get. And it does so early on too, so there's little adjustment time. The US release benefits from an all-new checkpoint system, not to mention slightly friendlier opposition. Problem is that some of the later stages are still pretty long, and for whatever reason some of them still don't have any checkpoints. Most of the earlier missions have them, at least the lengthy ones do, but that's not the case later on. It's an intentional omission, but one that certain editors, err, gamers won't like much.