The problem with comparing Livingston to Moyer, is that every single slop lefty who can't top 90 mph in the last decade seasons gets compared to Moyer (Or Tom Glavine for that matter).
Moyer is Livingston (and others) 90th percentile of what he could be.
Because of the speed he throws at, people tend to forget that Moyer has been a very good pitcher for a very long time.
Those guys are quite the rare commodity.
EDIT - I see doug stated my exact point in about half the words just before I did.