I really don't think performance wise there's a big (or any) difference between the four, it all comes down to your luck, and which chip you get, i.e if you get a great XFX chip it'll kill any 'normal' chip from the other three and vice versa.
I guess a good measure here can be fan loudness, 'cause that's one thing you allways want to rid yourself from.
XFX are known for loud fan.
Gigabyte's fan is not loud - but many of the chips, have a problem that the fan is 'scratching' against the HSF, it's nothing you can't resolve with a little 'push' with a screwdriver, but you need to consider that.