Pretty interesting; seems like everyone has their own take on what mic to use. I get the idea that Eitzel has a somewhat difficult voice to record. Listening to the stuff he did on Warner Bros. sounds great, likely due to a nearly unlimited budget and all the perks that come with it. Listening to his recent recordings where there is a considerably smaller budget the recordings don't reflect nearly as well on his voice.
What's odd is that I've heard amazing vocals from a different artist using an AT4033 and sub $1k preamp with amazing results.
My guess is Eitzel's just got a tough voice to record(?) Or they haven't yet found a budget mic/preamp combo that truely suits him(?)