ok.....wasabi V1 was the very first 9wire modchip that was compatible with all drives. Problem with it, the clk point was not stable and some wiis was not compatible with the chip.
Wasabi v2 chip....revised version of the v1 super stable...but still had some clk issues but not that bad as the first one, compatible with all drives.
Wasabi v3 is the revised version of the two wasabis. Extremely stable, easy to install but tricky to manipulate, works with all drives no clk issues.