You are such a tool. Nobody knows what happens, if both grow up at the same time.
Obviously Fed being born 10 years earlier, he plays on fast grass and develops his game for fast grass.
Or you say if we invent a time machine and transport 2006 Fed in 1996? Do they play only one match? Do they play an exhibition or W final? We can't know for sure what happens if we transfer Fed into the past with a time-machine.
Does he have a chance to train a few months on fast grass? Does Sampras know Fed from the future is coming, so he can prepare?
I mean you are living in a fantasy world.
And even if we use your fantasy, and we send Fed back into the past and he loses to Sampras. So, what? Nadal lost to Darcis on grass, but nobody says he can't be the goat because of this.
I mean you've lost it man. Fed fans got into your head