I was watching some gator trax videos on youtube and watched the one where like 2 guys and a dog stood on the hunt deck and water did not spill over on to it. Will that be the same scenario for other boats like gator-tail or prodigy? If not, why?

Here is a video of my prodigy with two guys on the huntdeck and not under water. https://youtu.be/HOzDImgAq-M

The difference between sizes will be what affects the size of the huntdeck/boat. The bigger the more displacement, more displacement equals weight capacity. Now this varies between huntdecks, but this is affected by design. Design dictates size which intern dictates displacement. Example excel huntdeck is not as tall, also a 54 wide is more than a48

Ok thanks man that makes perfect sense.

To add to the above, GTrax huntdecks are also 20" long, and the way the I measure their bottoms is a little different. My old 1750 HD would fit an 1860 go devil hull inside it.

I absolutely love my GT 1750HD. But I think my dual rig is going to be a prodigy