I guess I've been "lucky" with the number of Motorguides I've had.
I've yet to have a problem I didn't create. I've bent shafts, jumped up and down on them, then went back to fishing.
One MK example sticks in my mind. I fished a Bassmaster T on the Potomac a few years ago and saw a pile of MK's at the support trailer with either a badly sealed foot breach or the shaft splintered from impact in the cold. (I should note that it was outrageously cold that week and the built-in sonar was fresh out on the market for MK.) That made the MG SS shaft more popular in my mind. I'll bet you can find similar stories with MG problems as the subject. It's the Ford v. Chevy of the fishing world.
I don't think it's a question of which is better unless you compare apples to apples. My experiences have been with the more durable lines offered in MG. I can't tell you how many fellas I've seen/heard just rave about their new top of the line, heavy duty MK/MG and when asked what they had before it was along the line of a 42lb. 12V, on a 20 piece, rickety 360 mount. :blink: It's like a fella driving around a contractor prepped S-10 and then gets keys to a new F250 King Ranch. To not like it would be silly, especially when you think how much it costs??
Your personal preference should really dictate your decision. Consider that you may be on that pedal for hours and spinning that head, so you'll want to go with what feels best in the long run. See if you can try a couple different ones at a club meet, rep. boat, or check with friends, if possible. They are both great companies and when you compare their like products, the similarities will be evident. Past style and looks, decide which one is most comfortable to your type of fishing.
Myself, I like the solid feel and durability of the metal pedal and push/push cable steer of the MG Tour series. Some fellas like that Mongo Fisher-Price pedal with the button on the wrong side. To each their own....BWAAAAAAHHH!!!
:lol: