FANS just to give you perspective, there is and will eventually be NO difference between any short haul operation in Europe in terms of fatigue/amount of hours flown etc..we are talking 830 (eighthundredandthirty!) hours flown in a year at a major as of 2014, this would have been unthinkable 10 years ago or even less. Long haul will eventually have the same problem.
So to ask if you are planning to stay in this or that company for x amount of years does not indicate much me thinks.
The truth is, if tiredness/fatigue is a factor for you (which it is for most of us flying for the airlines), then join the company with the best part time options/pay, not a traditional 5 days trips short haul operation, possibly commuting from the middle of the countryside.
Sorry for OT