EVGA GTX ACS3 edition here.
I've no particular brand loyalty, and got this card because of a great deal I got on it. The added cooling that the ACS3 version gives is nice, and definitely helps lower temperatures, even if I can't quantify that statement.
Some parts will be speed binned within the companies themselves, but it's right that they're all off the same production line.
I've never had a great 'feeling' off XFX products...not sure why, just one of those things.
EVGA or BFG if I had to choose.
HTH