They don't have to be exactly the same hardware but as close as specifically the CPU and GPU.
The in-game settings I'm after are either the lowest possible at 1080p resolution if possible, if that's not available then add some AA to compensate (altough I'm not sure that could work but it was just an idea) or medium-high but no SSAO, high quality shadows, AA or ubersampling.
Game version has to be with the Enhanced edition. If it's 3.0, 3.1 or 3.2, I don't think that's matter.
Thanks in advance!