I've owned both, sold both and bought both back again. I love the artwork on JD and thank god it was based off the comic instead of Stallone's movie. There is lots of interesting shots and the upper figure eight loop can be very satisfying once you get a rhythm going. The deadworld mod with the physical ball locks is also a neat feature but some (myself included) will argue it slows the game down and prefer the virtual locks. The dots are great and tons of great modes and humour to boot. JM artwork is meh... but the orbits and ramps are so much fun to hit and very repeatable too. I don't mind the glove as there is a strategy to where you drop the balls to collect things such as awards or even how your jackpots are collected once multi-ball starts. JM also has one of the coolest wizard modes called Powerdown too. If you haven't played or seen it check it out on youtube.

Neither are leaving my collection again but if push came to shove I would probably sell JD and keep JM.

Probably the JM spinner millions exploit.