Which one these is "better"

Well i hate to half to agree with the others but i rather be honest and imo neither are good the second is horrible the first is usable crap though i honestly wouldn't risk it choice is yours just remember the risk and think it though best of luck to you mate!
 

Not that it makes a difference, the 120 watts is the combined 3.3 and 5 volt output, not much lower than an XFX 550 with it's 130 watt combined output on the minor rails
It's the 2x 12v rails that when added equal 22a, and the ~400 watt overall that's really sad on a psu labeled 550w
 
+1 i have not actually seen one that bad in quite some time OP i know you don't want to hear this and were hoping one of these would be good enough but honestly just buy a decent reliable PSU it's not going to cost you a arm and a leg just so you know ;)