I couldn't tell where you live from your posts. I looked at both airlines as well. One thing people who are pro OO won't tell you is that you won't get a west coast base for a while from what I can tell. However, if your there for a while you will get one, YX you never will. So for me comparing the two there were a few things that made me decide on YX; E170/175 only fleet, no junior manning (which can be big if you commute), having a real union, and growth potential (which may or may not ever happen, the 100 E175 order may just be a recruiting tool). The biggest thing for me though came down to company culture, YX gave me a much better feeling that I would fit in. YX wasn't really on my radar but I gave them a chance and every interaction I had was great and I have not been disappointed. Nobody can really answer the question for you, we all have different things that make an airline the right choice.