Does anyone have any experience with these amps and can tell me what the differences are between them?
Road King is going to be seem more versatile at first, but really the Mark has a bunch of nuances the Road King can't even compare to. Mark has better leads, whereas the Road Kings rhythm is crushingly brutal. Yah, they are really different amps at the end of they day, but I totally prefer the Mark IV
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The Mark IV is pretty much the most versitile ever!
''Technological advancements are like an axe in the hands of a pathological criminal.'' - Albert Einstein
Triaxis FTW.
Major of 7 String Legion 7 > 6

Carvin DC747
Ibanez RG2228
Schecter Avenger Custom Shop
and my baby....
Gibson Explorer Studio
i would get a road king if money was no object.....thats thing is sooo tweakable

its like 4 amps in one
Stop Reading My Signature

Schecter C-1 Blackjack w/ EMG 81/85 PA2
Schecter C-1 Classic
Carvin V3m
Avatar 2x12 w/ v30's
Boss GE-7
Boss DD-3
To be honest, you *cant* go wrong with either one. Prolly 2 of the best production amps in the world right now, of course, I am biased....

Mesa Boogie Dual Rectifier Roadster
Roadster 212
Ibanez RG3120/ PL1770
GT8 (via 4CM)
Radtone Harmonic Converger