To be honest with my experience I would be inclined to go with Ryanair. They have larger planes than Easyjet and their seats are actually more comfortable, Legroom is also another major benefit. Ryanair have also stated their intentions to install wifi and ife on their aircraft this summer.
Ryanair have ordered the 737-MAX, they have said they don't intend to use those planes for transatlantic but I beg to differ.The 737-800 is used frequently on 2,800 mile routes so I am sure they could put in on a 3,200 mile route to NYC. We will see. I can see them expanding further east in Europe and into Africa. Ryanair is expanding rapidly, this week I have looked at flight radar a few times and seen deliveries heading across the atlantic, Infact I believe right now another aircraft is being delivered.