Mainly due to weight and the 4 knife drum. I have always run morbark, since ‘98, but the 1390xp I bought out chipped the modern morbarks hands down, except the m15r I tried which was 9800 pounds and just shy of 200 hp. I couldn’t tow it with a half load of chips!
Also the bandit salesman listened to my gripes about his machine and offered solutions. The morbark guy just argued with me about how efficient the two knives were over four.
Been happy with the bandit, I got the 130 hp gm. Little lacking in power when hogging wood to it, but we run 50-60% pruning so it’s not a big deal to me. Have been not so pleased with my dealer over warranty work but in the end they have corrected any issues I have come across. The promised loaner machine when break downs occurred didn’t materialize but we figured it out. Otherwise I would buy another in a heartbeat beat. Tough to beat their efficiency.