1996 speedster vs 96 sportster - help and advice needed

[j5canever]

found a 96 speedster and a 96 sportster online - thinking about buying it for the cabin up north in michigan so probably only using it a half dozen times a year - we have 3 kids 4/yo 2 yo and 6 month old - and 3 nieces - 20 y/o 5y/o 4 y/o and 1.5 y/o - obviously we won't all be able to ride together as it only seats 4 or 5 but want it for taking the kids tubing and fun stuff like that - question is which is the better boat for us - wife and i are both 250 lbs and kids are obviously a lot smaller - can't find anything talking about weight limits online - my guess is the speedster is better with the twin engines - what are your thoughts?