I would say that the Acid 80 from 06 and forward got looser and looser. As you may have read, the 06 was the king of B/J (still good in waves though). 07/08 got a tad softer rails. The Kode is softer still and has a bit more tailkick. All version will rip in bigger waves, but the beauty of the Kode is that it works better in slower waves also.
So in short, for the B&J part of your sailing, any of them will do for pure straight line work the 06 Acid 80 will in fact come out on top. But if you're gonna ride waves, the Kode 80 will be looser and easier to work at slower speed.