yeah, the HOs are a little more squirlie than the stereos are. the stereo wake skis aren't fully rockered from tip to tail like the HOs. they have a tip and a tail rocker, but are flat underfoot. that, coupled with the fact that they are 153 (I think) vs the 145 that the HOs are rockin, makes them a little more stable...especially for bigger dudes. either way you go, they're both dope to ride.
one thing I will forewarn you about - make sure you get good bindings. half of the wakeski bindings I've used blow ass and it totally kills the ride. definitely get something that latches on to your feet pretty securely.