M32 does not foil. It has curved boards, but it is not fully foiling.

Fastest around the course, likely by a long way, will be the foiling kiteboard. Just so much more efficient than any of the others.

Second IMHO is an interesting question between the Moth and the Nacra. Moth is certainly more refined and likely faster upwind, but lacks the extra downwind sail area of the Nacra.

The Marstrom is quick, but I really don't see it matching the others unless it is light enough where the moth and Nacra aren't foiling. In that case, the moth would be last by a lot.