I think I know what you mean, and I noticed that too on a picture comparing the lotus, macca and Ferrari I saw yesterday on autosport somewhere. Mclaren is also a bit higher on the engine cover bit as well. The front wing mountings look very different across all three cars. I can see the mclaren being a way ahead come Australia
Interesting stuff going on just in front of the drivers feet. Ferrari & Mc.Laren look different, from the pictures I've seen.
(And I do try to think 'meh' and not bother looking, but..)