Much, much better.
Same situation as you were in, last weekend my power-adjuster broke, so I had to switch from my 12.5 Skoop to 8.5 in winds where I wouldn't dream of getting the 8.4.
Now it was get up to speed, point upwind, go like hell
It really differs a lot. But the 8.4 could be improved quite a bit, word is that the 2002 has also much better low-end.