Mary

Dunno exactly what the fifference is but I'm sure that its quite a lot, the snuffers may be quite big, but the area presented to the wind is not, remember upwind its on the nose, also its low down where the wind is least whereas the furled one goes way up the mast in the stronger breeze, + Unless the luff is very tight, it'll flap, then you've got the weight.

Look at the Tornado's, and how they do it, they won't be very wrong. As to stuffing into waves, Ive never had it happen, allthough I think it could happen into breaking surf