I went through the same decision last year and ended up buying a 45HP Kubota 4WD with loader. I now own a PTO spreader, 2BTM plow, 7’ disk, harrow drag, brush hog, blade, sprayer, etc.
A friend of mine uses his ATV, really there’s now comparison when it comes to how much work you can get out of a tractor. When it comes to farming, HP really isn’t as important as weight, which translates into traction. What I can do in a single pass takes my friend several, and I’m working a larger swath as I go.
Now IF I could only have 1 tool, then I’d probably opt for a big 4x4 just because I can use it for other things, but for the "what’s better" I’d say a tractor.
Chuck