Ryanair have had more than 3 tailstrikes in that time. All on takeoff due to the -800 being a stretch version. Especially a problem in x-winds with spoiler deployment on over correction with aileron.
-700 Liftoff attitude Fl 5 9.1 Tailstrike at 14.7
-800 Liftoff attitude Fl 5 8.0 Tailstrike at 11.0
Not sure how the numbers compare on the a319 but just by looking at it you can see it would take more to tailstrike.
Not sure EZY and FR comparisons tell us much.