@XR6Hurricane, I think your question is a great one. The following is only my opinion of why I said the Lighter skier in INT would probably clean house.
For me personally, I believe everything has to be taken into account. The Skier, their ability level, their objective or goal, their equip. and set up. So, it is possible that many things can effect the outcome and/or apply differently for different skiers…
I’ve seen lighter skiers run through the course at 30mph on their “Traditional” ski with literally no problems. If I do that, I am sinking and plowing my way through the entire course. I cannot even begin to get free of the boat unless I’m about 32off. –and then just barely. It is more like a gym workout and less like Skiing!
For 30mph, I am on a 67” Theory. At 30 mph and 190-200lbs, I feel as though I am still sitting rather low in the water from the pre-turn and back to 1st white water. Maintaining a lot of speed is difficult. This for me, creates the physically demanding part. I must continue to fight to regain my speed. The over sized Surface area is what allows me to Ski at 30mph. But, B/c of the surface area (specifically the Width) there is also an awful lot of Ski in the water during the turn aspect, when the ski is on edge. It is also little harder to roll over on edge then a Traditional Ski as well, so I put a little more into it physically.
I believe a lighter person (150 or less) with the exact same ability level as a 200lb person, has the advantage (in INT WideRide Div.) of being able to use the same length ski as their traditional ski, but in a Shaped Ski like a Theory. Which, would have enough Surface area to “Float” the Skier properly at 30mph. If I were to go to the factory spec size for me, I’d need to use a 69” Theory. It floats much better, (I’ve skied it) but, it is just too big for me to navigate at shorter lines. (it’s a School Bus)
As far as the wake pop goes, I would think that it may be more difficult for a lighter person. But, w/o question that wake IS pretty big at 30mph and it will demand a very good Stacked position from everyone. A good Stack will give the skier more stability, more speed and better angle which all will result in a Ski that is on a better edge and will “Slice” through the Wakes better. -Rather then bouncing off as much. But, even Marcus Brown gets a little Wake Pop @ 30mph. So @ 30mph, it is hard (maybe impossible) to eliminate completely.
Wider Ski's also have wider tails and they Pop Bigger! But, a Good Stacked position will also reduce or eliminate any neg. Pop effects upon the Skier.