ratios
ask your dealer to supply you with displacement ratios on both boats. the 380 has a higher aspect rig than the 410, resulting in a higher sail area/displacement ratio. It handles better in light air, but is somewhat tender compared to the 410. The 410 has a higher length/displacement ratio, which would be an advantage for cruising because added weight will tend to disturb it less. A buddy of mine has a 380, and his PHRF rating is lower than that of my 410 by 12 seconds a mile. (Time that his smaller boat owes my bigger boat!) Both our boats are deep keel configurations and furling mains. There is no way I can keep up with him in light air, but in heavy air I will waterline him every time, especially going to weather in choppy conditions. It all comes down to what you plan to do with the boat, but don't let anyone tell you that the difference is only a few feet of waterline. (Or an extra head.) The 410 is a beefy boat compared to the 380, and will have better manners offshore in heavy weather conditions. By the same token, it might be too much boat for gunkholing on summer weekends. Don't forget that the cost of operating a bigger boat is more than just the initial investment. Higher slip fees, costlier haul-outs, you name it. Also think in terms of needing bigger winches, heavier ground tackle, etc. My buddy got away with installing an Autohelm 5000 on his 380, while I felt it important to go with an Autohelm 7000 on the 410. Good luck in your decision, they are both fine boats.