And indeed Wizz is a winner here - at present much stronger than its rival Sky Europe (the latter one is atually retreating from CE Europe).
Concerning Ryanair, their competition has been fierce, but on some routes Wizz has survived better (it applies mostly to the destinations outside of the UK/Ireland). For example, Wizz Air has been dominant on the routes from the eastern EU to Germany, Scandinavia, France, Benelux (not a single route operated by FR yet/ any more). Not to mention that FR didn't manage to create even a single base to the East from the Stockholm-Hamburg-Frankfurt-Milan BGY line. Nevertheless, I doubt in their peaceful co-existance in this area for the years to come.