I wouldn't be surprised if the Kaiyen bow has more square footage than the Craz bow. It's just square instead of triangle shaped. If you rotate 90 deg vs. the traditional forward facing position, there is plenty of room for two average sized adults to sit comfortably with legs fully extended.

You will need less weight to ramp up wave amplitude with the shorter hull as well. I also run mostly with just our family of 4... 500-700 lbs of lead gets you a very fun wave.