So I'm trying to decide if Its worth upgrading my 2012 Retina MacBook Pro 256G to the 2015 512gig? I've looked up the specs and I know there isn't much difference overall, but the benchmarks do look like I would see both a boost in processing and video. I do like to play games on it and am hoping the boost will let me play some of the new games (old) ie: The Metro 2033 games are horrible on the 2012. Advice? Thoughts?