You can, & I have, Geek Bench 4 says its a very very fast phone ! lol
Now my 820 powered phone isn't to bad at all, its just fine, but this is OCUK so, ya know, 'overclock' or get the fastest speed.
However, I'm still sitting on the fence, been delayed until the end of the week to get this phone unlocked and im having 2nd thoughts now, not sure, I guess I could sell on I keep telling myself.
I guess geekbench also tells you that the faster cpu will open the app and it will be optimized 100x better on whichever has the higher score right?