I own Premiums on both
JP is the cooler pin - more going on in the PF - coolest mech - great animations - deep ruleset
Difficult call
Both have a lot of shots - though just looking a PF's JP looks like it has more but that's a false perception
I was thinking of giving up Maiden for GnR so I started playing MAIDEN some more than I had recently and I still really love it.
It's just a super fun pin, I like the music, really great call outs, good code, great modes
you really need to play both
For me JP is the more difficult pin though neither one is really easy, I get more frustrated playing JP
I think both will be in my collection for some time