Vox AC-30 hands down. The closest Ceriatone amp is the Dizzy 30 Matchless DC-30 clone which was based on the Vox AC-30 design.
Hmmm. . . I was just about to order a JTM45... I checked out some youtubes of the dizzy 30 and the tone seemed rather thin / weak in comparison to the JTM45 samples I found. I wish I could A/B them in person. I've never owned a Vox style amp, mostly Fenders and Marshalls. I did use a reisssue AC30 for several hours in a studio and found it to be quite pleasing, but my JCM800 has really got close to the sound I want even though it has way too much gain for my needs.
I guess the only way to really know is to compare side by side. Any other thoughts?
The DC30/Dizzy 30 is noticeably tighter, more focused and stiffer than the AC30, a result of much heavier filtering. In shiort, it's more "modern" sounding than the looser, more vintage AC30.
By comparison, the JTM 45 is much looser, and mushier and less focused when overdriven. It's also has the high end roll of much earlier and has a lot of boomy bottom end.