I recommend you contact the Multihull Company. Catamarans for Sale They are dealers for both and they would probably give you a good comparison. I suspect Dolphins are slightly faster although the Catanas have nicer interiors. You can get specs on both there. Dolphins are more affordable and I want a Dolphin 600. Come on Lotto. BOB
Both good boats. Dolphin a bit faster if it's not too loaded down. IMO the Dolphin interior is too small and cramped, and not enough storage room for family of 4 offshore. I looked at both and chose the Catana. We cruise at 8-12 knots boat speed which is fine for us. Very happy with my choice.