I have a 4310 which is rated for the LX6, not the MX. I ordered the LX6, my dealer said I was stoopid, and that Ishould get the MX. I got the LX anyway, but he also ordered an MX for me. Atefer using the LX a bit, I realized it would never last on out place. So I went back and told him I was smarter now. He happlily loaded up the MX.
Truth be told, I think the MX is great. If someone has an LX and likes it, that is just great. But I could not usually recommend one to anyone. If the MX won't do, maybe Woods or BushHog would be the best choice. The sidewalls are just too thin on the LX. YMMVSYDFD.