[DJones]

Thank you for the advice.
For performance (stretchiness, adherence to body, warmth) open cell/smooth skin is probably better. Durability seems to be another question.
I need the thinest, warmest, better gliding wetsuit possible.
So I just think I have to try this Elios suit (I'm choosing Elios only because it's the only custom made suit available via a local resseller without having to pay in foreign currency).

I hope if I take great care of this kind of suit, it may last long enough.

If ever it falls apart, I can make an "under jacket", "under hood" and bermuda for winter spearfishing.