Well, EFI allows you to run a more sutable ignition curve for the 2.0l, this helps a lot.
Again a proper fuel map for the 2.0l helps.
You dont have to run the intake charge through and round that large flappy air flow meter.

Cam timing is also a factor, a few degrees either way can make a big difference.

Mine reved happily to 7500 in the first 4 gears at the expense of the cam which suffered oil starvation.

S.