I think the twin jet was one of my favorite amps I had. It is voiced more dark than a wizard. I don't know about the mezzabarba. I had a VH2 that I thought was a kick ass amp, too. I never messed witht he omega or ksr. I think the diezel has a great high gain tone. little darker and smoother than a slo. The Twin jet has a better high gain tone than the diezel and slo in my opinion , but it is very smooth and polished also. The Wizard is Rude and very strong in upper mids. Very in your face. Might take some getting used to to change from that structure. I was into the darker side of amps also. After a couple days, the Wizard had me hooked. I say buy one and have the twin at the same time. If you don't like the wizard, sell it. You can probably buy one of classified and then resell it for same price if it isn't your thing. But maybe before you sell the wizard, pack it up and pretend you sold it just in case, lol. I could never get rid of this Nasty Bitch.