i dont have any experience with the cadet, but my friend has a zoom 340(not the 380) and its pretty f****** tuff. We have taken it on some pretty crazy trips for it being 11.5 feet long and inflatable. We also went through a 'wave jumping' phase, and im suprised the boat held up to that at all, but it came through without a scratch. However, for diving it might not have a ton of room, although i dont know how big the 380 is. we had room for me and my friend, plus gear, and we had enough room to suit up, but barely. Also, its not the most comfotable ride if your ging fast and its choppy, but again with the 380 it might be different. Overall, for the price, its a rock solid boatthat can handle whatever you need it to, and then more. For comfort, you might wanna go with the cadet