Im trying to choose between LED or NON-LED.

The argument must be:

When playing dredge-combo(led or not). U probably will win game 1, are there games where you lose game 1 because you play the slower non-led version? My guess is you don't.

On to game 2.
Making it more consistent must mean game 2 fights vs. gy-hate gets better?

But what against other combodecks. Is the faster LED-version better because you can "combo" off before he does? How is the non-LED version against combo lika ad nauseum?