the 360 controler will be a better option because GFWL titles wont read any other controler propperly untill you install hacked drivers. this is typical of microsoft. i can 99% guarentee when you plug that 1 in the confrols will be reversed for at least 1 stick...
i had this issue with darksiders, mirrors edge and wheelman.
Didn't have this problem with Logitech F510, but I agree with you on the Xbox controller for this game anyway. The offset analog stick layout is more comfortable for Darksiders than the side-by-side pseudo Playstation layout. Also the Xbox's triggers are nicer than most controllers that you can use for PC.