Quoted from Monster_Bash:
The Night Crawlers are integrated so well in the game..especially Danger Room. I couldn't imagine playing Xmen without them.
Multiball start with the spinning magnet disc is one of the best MB starts in pinball...so much so I bought a Twister =).
The GI coloring when choosing\playing Villain really sets the mood for the battle
The moving Iceman ramp brings the ball back to the flipper needed to make the next Iceman shot. The ramp (and the game in general) gets a bad rap from horrible code that took years to correct...the ramp would just randomly stop and dump the ball SDTM...over the flippers etc. Obviously that's been fixed
IMHO with the LE having 3 additional toys (4 if you count the Night Crawlers as 2)... the difference in the Xmen LE and Pro are the most diverse since Stern went to the LE\Pro business model. Considering were the LE is priced...it's a no brainer over the Pro
The iceman ramp misses the switch, obscures your view, and basically serves no purpose as you can just roll the ball from one flipper to the other on a made ramp to shoot it again...don't even need the ramp to move. To me it's a complete negative with no positives at all, if I had an LE I'd disable it probably (kind of like how I disabled the diverter on AC/DC as it ruined flow).
Nightcrawlers are cool, much easier mode on the LE compared to the pro. Plus is that they're somewhat fun, minus is that they block combos and other shots.
The spinning disc is also a +/-, you get some nice effects off it but the magnet on the pro is used a lot more for throwing the ball, so I'm not sure if the spinning disc vs more active magnet end up up being that much different other than the multiball start, which is MUCH better on the LE and very lame on the pro.
The other gameplay difference is that the LE wolverine is positioned too far to the left, blocking off the Beast shot where the pro is mounted farther to the right. A fixable issue, but by default the Beast shot is much better on the pro.
GI led's are cool, but if your pro has LED's it's not a huge difference...I have LED's in my pro and have an AC/DC premium, I guess I just don't notice it being that big of a deal. Default pro though vs LE is a big difference in favor of the LE.
I guess I would put it, if glitz and glam are big deal to you than the LE is probably worth the $1500 extra. If you've just looking to play it and don't care about all the glam, the pro is the better option for your money.