If a neoprene drysuit, it makes absolutely no difference if a wetsuit or drysuit in these relative high temperatures, both works just great and would be my choice.
If a real drysuit, I prefer these for winter conditions as you are much more free "inside" and a lot faster and easier and warmer to change.
You will look a bit more "clunky" yes, but still really free inside, nothing that feels hindering like a really thick wetsuit.
For foiling I most often use a warm wetsuit in the winter, simply because of the risk of cutting the drysuit with a wing, and good drysuits are extremely costly (but worth it)
If REALLY cold and winterly, I use my drysuit for foiling though, but ride more careful.