You are going to find it laughably easy, much the same except you now get to drive the boat too!
One difference is the pull is slightly more up than forward (that's a slight positive). Now that you've dialed in riding the wake without the rope, you are ready to drift the kite and surf the wind swells, but you''ll have to focus of bit on keeping the kite flying (that's a slight negative).
One advantage of boat learning, is you immediately learn to ride toeside, which opens up wave riding and carving. One disadvantage is you aren't forced to learn to foil switch foot, and I can tell you from personal experience that puts up a mental block. I foiled left foot forward only for 3-4 years, which works fine, but you are less efficient upwind toeside and your body gets sore. Force yourself to tackle other foot forward, it'll take you 3-4 lame sessions, but it's worth it. I only wave ride left foot forward though, just use right foot forward to upwind tacks.
Balance wise and setting up foil ... should be no difference.
The H2 / Gamma is a sweet wing, I used it sup foiling and a buddy has it as his main kite foil. It has more lift than most dedicated kite foils ... this means you can use a much smaller kite, though you won't go quite as fast. (but probably go as fast you actually want to!)