CART V's F1 - what gives?

[Wrex]

I know this is a dumb question considering where I am posting this, but please bear in mind I have the mechanical knowledge of a monkey - Well, I will have when I finish reading a few more tech books.

The question I'd like an answer too (in plain english if possible), is what are the differences between a CART car and a F1 car. I'm aware of a few of the major things, weight, Turbo's, tyres etc. But what I'm really confused about after watching the last CART race, is why does it seem easier for a driver in CART to pass another car when compared to F1.

Is it the Turbo or the "go fast" button, or Aerodynamics. To the Laymen, the cars roughly look the same, so what is it. Most people in the F1 forum say its because of the wings and the tyres. Is it as simple as that?

Thanking you in anticipation



Wrex

BTW, I was going to post this in the F1 forum, but figured the answer would get clogged up with rubbish posts like my thread about F1 fuel stops.