WipEout Pulse

[Lasthope2300]

Hey guys I'm new. I got this emulator (most recent version) for my ipod 4g (jailbreak for 6.1.5) and ran wipeout pulse pretty smoothly at a constant 50-60 fps with these settings:
Non buffering rendering
Frameskip 4
Prevents fps from passing 60 ( checked box)
Alternative speed - unlimited
No mipmapping
1xpsp resolution
Checked boxes hardware transform, vertex caches, and low quality s&b curves (speed up)
Checked boxes disable alpha test and texture coord speedhack
In System: fast memory checked.

This was fastest in the time trial. Races were on the lower end of the speed spectrum but still not SUPER slow.

What's the fastest this game can run on ANY apple device? Is it faster on the iPhone 4S and 5? Also, the wipeout pulse iso that I'm using is the Europe version. Does it really make a difference to use a USA iso instead?