Quoted from markmon:

This is stupid to say that speed is number one. You know what would be the fastest? No ramps, no pops, no toys, nothing but two orbits. How fun is that?
And on the TF vs TFLE front, any perceived ramp speed is more than made up for by flowing orbits. A couple extra ms on a ramp is nothing compared to an orbit shot that immediately flows around to the flippers (TFLE) vs one that drops into pop bumpers that hold the ball forever (TF pro).
It's not just speed you want, you want good flow. But you also want interesting things to shoot at. As far as tron gameplay goes, there is nothing that makes the game play if the pro better. And as a pro owner that went LE, the two games play basically the same. As far as TF vs TFLE goes, I already covered the flow points above. But the real issue is that the added LE features just weren't that interesting. As for acdc pro vs LE, I can't see a good argument for the pro bring a better game. The bell is really fun to shoot at. The lower pf actually has some flow. The TNT being standup is even more of a dickish outlane drain point that the drops. As for xmen LE vs pro, the speed will be the same. You'll have to decide if you like the features.