I fly regularly routes on which Ryanair and easyJet compete and tend to choose Ryanair for two reasons: to avoid the unpleasant "boarding experience" which is so often typical of flying easyJet and the latter's relatively poor punctuality on the routes in question. I would do so even if the fares were the same.
I've yet to have a Ryanair flight cancelled after I'd commenced travel so perhaps my opinion might change if this were ever to happen. In the meantime, I keep my fingers crossed.