We cruised our 410 standard version (4 cabin
/ 2 head) in the Med and from the Med to the Caribbean
during a sabbatical.
We met another family
on a 380 S2 Owners Version in Spain
on the same trip, we cruised the spanish coast together, crossed Gibraltar
together, rejoining at the Canaries
and the Antilles.
I spend more than one afternoon on our buddies boat (chatting, drinking, repairing stuff). So I guess I can comment on both.
The 410 is just a bit faster on all courses but not a huge difference. The slapping against the protrusion in the bridgdeck shape seems to make the aft cabins of the 410 a bit louder than on the 380. But that's about it from a sailing perspective.
I don't think there is much difference in carrying capacity, as the 380 has relatively fat hulls. Both cats were heavily loaded, with lots of amenities and lots of stuff onboard.
Bridgedeck clearance is sufficient on both to make substantial bridgedeck slamming are rare thing, limited to beating against the wind
There is an often debated difference in engine
placement between the 410 (under aft cabin bed
before rudder) and the 380 (engine in separate outside compartment, saildrive
behind rudder). Some like one arrangement more than the other, the net is full of mostly biased comments. I don't favour any particular approach, ours worked out OK for us but I think I can live with the other with no problem. Don't worry about getting the under-bed engine
out in case of trouble, that is simple and takes almost no time (we had one rebuilt).
The 410 was available with a straight shaft drive option.
The construction and fittings of the 410 feel a bit beefier but not much. The electrical
seems to be better engineered on a 380 S2 than on an earlier 410.
Regarding creature comfort there is standing headroom
everywhere, at least for me. Of course also in all heads.
The individual cabins are of equal size, not much difference, except for bed
orientation in the aft cabins.
The heads have a completely different layout.
The standard head on a 380 is OK as a day head but I would consider it only as an emergency
shower. The owner's head is really nice and well layed out.
The two heads on a 410 are much bigger, with lot's of elbow
room and a somewhat separate shower space. The floor has a slight slope to ensure that the water stays in the shower area (not when showering underway). We added a curtain and had no problem at all. We even showered with two small kids
even when on passage
and did not feel cramped. There is a sitting area in the shower useful when taking a shower on a rough passage
I would put both on par from that perspective.
But this is only the case for 380 owner and 410 standard version. A 380 in charter layout (4 cabin, 2 heads) lacks a useable head (in my view). Same for the 410 charter version (4 cabin, 4 heads).
The 380 OV has a nice desk area, which helps reduce the stuff lying around in the saloon. This basically come at the "price" of one front cabin.
The main difference to me is the living area in saloon and cockpit
The saloon on the 410 feels muach bigger, a nicer sitting area, more locker space for kitchen utensils, food
and crockery. A bigger nav table.
of the 410 is a bit wider, bigger, more open space, nicer table and seating. There is one drawback: as soon as water comes over the bow there is a little stream of water running over the deck finding it's way into the cockpit. The 380 has a deck shape that directs this water away from the cockpit.
We liked the additional space but I would not overemphasize this. A 380 is already quite nice, the 410 is just a bit better.
I would consider both, and buy the one that is in better shape, better equipment
or better price