I'll probably be going for PES again this year, it's been back up to standard for the past 2 or 3 years at this point. Although for some reason, after really liking 2013 initially, I struggled to get into it after launch. The removal of league mode did not help, I'm just not a fan of master league these days and all the crap they've put in there, thankfully league mode is back in 2014 I believe.
As for FIFA vs Pro Evo, it's quite simple, if you've played and enjoyed FIFA for the past few years, I think there's zero chance of you buying into Pro Evo now, the quality of the product does not come into it.
FIFA is a high quality game itself and it's doing too many things right for PES to ever make back the numbers, but at least it's nice to have the choice for people that don't get on so well with FIFA.