[internetuser]

OK, I fancy Tekken, its £15, but on the US Store its 20 dollars, (just over a tenner)

Is there any reason not to buy the US one ?

[Zeromajor]

There are some differences with tekken. A patch has just been released which includes an extra online mode and dualshock 3 support among other tweaks - it's exclusive to the japanese release though, so something like this might happen with either the us or uk release in the future (for example if you got the american release and a uk patch was released, the patches wouldn't be compatible)

Also, the uk release is just for europe - I've only ever seen european players on my uk version, so I guess if you got the us one you'd be fighting against yanks.