It can depend on the country of the base and any local agreements.
In the UK I personally think that Ryanair is better if you're looking at the short term, the FO salary is better than an easyJet FO salary, even if you consider the extras you pay for at Ryanair. The fact you get a 5/4 roster can't be forgotten as the easyJet random roster in summer is incredibly demanding and full of changes, I found Ryanair to be a lot more stable.
EasyJet seems to reward those who have been at the company a long time. The captains are paid great salaries, treated nicer than you would be at Ryanair, and they receive a decent roster. If looking for a long term career with a company, I'd pick easy.
This is just my personal opinion though.