No, I've never driven any formula car, I only do some karting competition.
I think it's the most logical way to think F1 cars are more difficult under braking than GP4
In GP4 you just smash the brake pedal to the limit, and than you will slowly take away the braking strength till you are at the apex. You must do this to make sure your car will turn in, without locking your front/rear tyres.
This seems to be realistic, but there is a little detail thats missing. When you do the same corner, but you don't take the brakes slowly away, you will be of course slower, but you will in no case crash. So for me, espeacially during races, there is no challenge at all as it's all too easy:-s
Just try this in ANY car without an ABS system. (not on the road plz
)
you will realise that my point may be correct on this matter