Quoted from MikeS:I'd go Pro. If you're already throwing up 1.9 billion scores on the premium on limited play (largely on account of walker bombs) you may grow tired of the game faster. The Pro plays faster and has better flow and is the more challenging game because it doesn't have any gimmes. Just check out the scoring differential between Pro and LE models. Walker bombs are kind of like the "smart missile" of the DE days. Biggest thing you're missing out on is the lighting.
That was an amazing game that he put up, but my pin was set up easy and a somewhat loose tilt, so it would be very easy for him to make the pin harder if he felt the need to do that. He had other games where he scored well under 100 million, so it's not like every game was epic.
As far as the pro being more challenging, it is in some ways (no Walker Bombs), but it is easier in other ways (no Bicycle Girl to bash, which is a very risky shot on the Prem/LE version, vs the pro where you can just continuously loop the ramp shot).