Hey Christian,
I haven’t really noticed much of a difference in speed, but I’ve never been that perceptive of that sort of thing (except on an old slow netbook, I’ve never noticed Chrome to be as fast as everyone claims, for example). For a long time, I never used Safari, but it is my main browser now because of how well it integrates with the OS and also with Safari on iOS. I love the zoom feature on the Mac, for example, and use it all the time.