Quoted from dzoomer:

There's no problem with telling people what one likes about a pin. Too bad you continue to highlight the BG ramp in the LE to justify the Pro, which is not a significant issue for Prem/LE owners, especially in home use. This has been posted and discussed before multiple times, and it is ignored by the same three or four Pro owners over and over again. The big majority of Prem/LE owners just don't have significant issues with the BG ramp on the Prem/LE. Yes, you report your anecdotal experience with a few pins, but in much much higher numbers Prem/LE owners find the BG ramp works just fine and well, right from new. For those few that had issues there are a couple posts showing how to adjust the ramp to fix it (no mods needed), and there are a few flap option mods available for people that want the quickest tweak. BG ramp issues just aren't significantly talked about by Prem/LE owners. It's the few Pro owners that continue to perpetuate this myth. The REAL ramp issue on the pin is the right ramp; that is where the airballs occur, with fast shots and especially when doing combos after the tunnel shot.
The actual difference that good reviewers have detailed between the BG ramp on the Pro vs Prem/LE, and in describing their preference for the Pro, is that the Pro has more flow. It's a ramp shot and the ball just keeps going around; the Prem/LE has the flap to expose the added bash toy and thus has less flow when the bash toy is exposed. But many prefer the Prem/LE BG ramp because it offers additional variety in game play, both flow at times and an added bash toy at other times. It's just a preference in game play and simple stuff.
If one wants to talk about problems on TWD, let's focus on more significant problems. There is the right ramp as mentioned (same on both the Pro and Prem/LE) and the TWD Pro has had big problems with STDM drains out of the pops. It was a huge issue on the Pro when it was first released and the hate from some members here really impacted the perception of TWD in the pinside community. LE owners said they had no issues and were even mocked for it (and by members who never played the Prem/LE). Then low and behold members found that the Prem/LE did NOT have an issue with drains from the pops (setup was found to be important). But note, this issue has remained associated with the Pro. It is definitely more significant than the BG ramp so let's put it out there.
You are missing other differences from your earlier post, but I'll highlight the GI upgrades (haha); they are big in the Prem/LE. It makes a large difference when playing the game and in enveloping you in the atmosphere of the pin. Visuals in game play are a huge part of the experience. Check out the horde mode alone. » YouTube video There is also the additional sound files for the Prem/LE which haven't been made available for the Pro. Love all the options there.
Both are great machines. Walking Dead Premium/LE won 2015 pinball machine of the year. http://gameroomblog.com/reviews/2015-pinball-machine-of-the-year