Lets be honest, Strikeforce as a organisation is always going to be second best to the UFC, but this game offers things that THQ failed to rectify from 2009 in their 2010 game.
Mainly this is due to the cheap AI, in UFC a wrestler will take you down with EVERY attempt, Muay Thai fighters will get you in the clinch with EVERY attempt, and most importantly, executing submissions border on impossible, as are escaping from them.
The Fight Night engine handles MMA very well, with the flick controls on the right stick being very good once you get the hang of it.
And as an MMA fan, the choice of different rings and fight rules make it more of a varied game then UFC Undisputed, such as unified rules or vale tudo.
Is it better than UFC Undisputed? No. Is it worse than UFC Undisputed? No. Theyre different games.