Weight and width of tractor is not always a good comvo for sidehills and steeo slopes. Big tractors have their weight higher than smaller tractors and a higher cenrer of gravity is a more tippy situation on hills.
Also your cj5 is not a good center of gravity. It is too high and too light and narrow. Comparing it to your rock crawler isn't logical because your cj5's primary advantage is being nimble . A far better vehicle on hills/slopes is a volkswagon beetle (old one or new one). Irs biggest weakness is ground clearance . . but it will stick to the hill long after the cj5 is in the ditch or ravine.
There is some truth to some of the things you say but it isn't an illogical comparison. A tractor is much more comparable to my jeeps in both height, weight, and length than it would be to a VW. A VW is much better on side hills, but they don't make tractors with 6" ground clearance.
All of the options listed are the same height but, to your point, I do need to look at ground clearance to get a better picture.