They're an orphan machine from a brand that, to be honest, hangs in the balance. Briggs is looking to offload Simplicity, and has been for a while now. They were built by Simplicity, though you'll find them sold under the Massey Ferguson livery as well, and they're excellent garden tractors. Diesel was an option for the longest time, but so were Kohler engines; that changed when Briggs purchased Simplicity Mfg.
These are garden tractors with a loader available; they're not subcompacts and they'll never have the capability of one, no matter how they're outfitted.
Unless you're using it primarily to mow, and the loader is a self-propelled wheelbarrow to you, you're going to be disappointed. Buy the right machine in the first go, it'll save you more money in the long run, I can attest to that.