Well, the Ferrari drivers are complaining about the behaviour of their cars, from the link above:
About comparing last year and this year:
Hamilton did 1:23.9, Vettel did 1:24.45, FP2 2018
Hamilton did 1:21.1, Vettel did 1:21.8, Quali 2018
Hamilton improved his time with almost 3 seconds.
“I can feel I have the car under me that I had in testing, but it doesn't do the same things, it's not doing exactly what I like here and there, and that's why I'm lacking confidence,” he explained.
“I don't think it was awful, I think here and there there were bits that were really really good, and [that] we can build on.”
Leclerc admitted that FP1 had been “very positive” but said he was struggling to get the tyres switched on and cope with the wind in FP2.
About comparing last year and this year:
Hamilton did 1:23.9, Vettel did 1:24.45, FP2 2018
Hamilton did 1:21.1, Vettel did 1:21.8, Quali 2018
Hamilton improved his time with almost 3 seconds.