I looked at both those boats when I was in the search last year. I liked both very much, but probably favored the Idylle 15.5, which I think is a very
seaworthy, stout boat. In the end, I chose an older 46 ft
cutter with much heavier construction, more unique character and much more
liveaboard storage. It was the
storage that swung the deal. Also, I just got nervous about the 50+ length.
I think if I had to choose between the two you mention, I would choose the Idlylle - just my opinion.