..but overall you can do nearly everything in a s's than in a compact....yes?
Not really. The machines are designed for different core functions
I really like the idea of the front mounted bushhog, so you can see where you're going versus continually looking behind you...lol.
Depends on what you are mowing.
Now I will elaborate some. First, I think given you already have three tractors, getting rid of one and keeping the SS is the smart move, and will give you the most overall capability. Just have to decide which tractor to part with.
Some good points about SS have already been brought up so I wont mention anything that has been already.
Bushhogging going forward......thats great if you are blazing trails through nasty brush etc. But got a 5 acre pasture you want mowed a few times a year.....the tractor is gonna excel. Larger tires and longer wheelbase make for a smoother ride, all the pollen and dust you kick up stays behind you, not tearing up the ground every turn, etc.
Pulling. tractors are made to pull. Wood hauling trailer in the woods, skidding logs out, pull a moldboard plow followed by a disc, etc etc.
Tractor is also easier on the lawn if your wife wants some mulch up around the house / flowers
Implements are cheaper and more plentiful in the used market.
Moving dirt, spreading gravel on the driveway, running a grapple bucket clearing brush or moving logs, all things a tractor "can" do....nut a skid loader can do better/faster.
So in summary, I dont think there is anything a skidloader can do that a tractor/loader cant, but the skidloader is gonna be better for most of them.
But there ARE things a tractor can do that a skidloader cannot. Having both = maximum capability