I don't know the V4's as well as I do the 3cyl omc engines, but I think even that late the only major difference in the 90-115 was carbs, exhaust tuner, and maybe the heads were higher compression on the 115. I'm not for sure on that thought so don't quote me. Rotus if you go mod V look at the jet hulls built by the northwest/western boat builders they have a slight v but go to a straight flat pad ahead of the outboard jet intake, and then usually have a chine crimped in along the edges and maybe one other set of chines as well for grip. I've had a mod v boat where the front has a slight v of maybe 5-6 degrees that continued down the length of the boat, it wasn't any smoother riding or better handling than a flat bottom. My current is a mod v with a slight V pointed front but goes to an entirely flat bottom if I had bought it new I wouldn't have spent the extra for the mod v design. If your going to spend money on having a slight v design and your running a jet this is the sort of design that works best with jets in regards to making them handle and run better. There is a reason most of the reputable jet boat makers use this sort of general design to include woolrich, alumaweld, koeffler, etc cause it works best with jets. It helps clear away air before the intake, gives the boat some gripe in turns, it helps lift the hull for fast planning, and can stay on plane at lower speeds. This was just the best picture of general jet boat slight v, delta pad design with a lifting chine. Alumawelds site also explains the bottom design pretty well granted they have fancy names for each bottom. If I was buying a new hull and had the money I'd go with a design like what I'm referencing, but flat bottoms work pretty darn well with a jet, you get tough flat bottoms made pretty cheaply, and they really don't handle too bad when you know what your doing. Just my 2 cents worth. I think once I'm finally to a point a needing a new hull I'll probably go flat bottom due to cost. I've been pretty impressed with my friends 2060 for what he paid for it that he had made in Louisiana. Granted he got a pretty good deal cause we were willing to do all the finishing work he bought just a bare hull. We wired it, put it on the trailer, hung his motor on, put his trolling motor on, mounted the gas tank, and painted it was a lot of work, but he came out pretty well over all.
https://www.alumaweldboats.com/bottom-vee.htm