Impossible to read much into what we've seen so far. Even something as simple as a paint job can confuse your impressions but from what I've seen the Ferrari appears to be the least cluttered design followed by the Sauber and McLaren. It's interesting this time round to see McLaren following the Ferrari lead by incorporating pull rod front suspension and most of the cars in fact nearly all of them, including McLaren and Red Bull have included the little winglet under the rear wing that Ferrari introduced last season, yet Ferrari haven't included it on the F138 this time. Of course that doesn't mean it won't become an upgrade as testing gets underway.