I had a M135GX and traded it for my M7. My nephew bought a M110GX which is very much like the M6-111 except for not having DEF. He bought it used with about 300 hours and now has 3,000, loves it. If you get a loader, get the KSR. Huge difference driving nephew’s vs mine when moving bales. A neighbor upgraded from a M100GX to a M6-141. Twice he had problems with DEF. Dirty DEF must be an issue because last year Kubota kept sending me coupons for 10 gallons free DEF every 3 months. I’ve never had a DEF problem with my M7. I wish I had been able to keep my M135GX because of size but I couldn’t afford to have 2 tractors so close in power. The M6 is so much more maneuverable than the M7 due to bevel gear vs planetary front axle.