I wonder why that would be so. If they have similar platforms, ie. banana boards, same sail area, etc., and the M20 is almost 120lbs lighter than the F20, what is it that makes the F20 so much faster?
I have a gut feeling that you can build a boat that is TOO light for certain conditions.
However...the Marstrom has had a lot of teething problems and it has a couple different configurations - some with a jib and some without. Some issues may be related to sail development...It's a piece of artwork though. I suspect that it's overpowered for it's (lack of) weight.
