I have finally been able to own both these amps, and put them both through the works to see not which is better but to see which I prefer and for what. To start they both are really great amps, but both have cons (possibly not universal issues but I will share what is wrong in my view with the models I own) Dr Z Carmen Ghia. 18 watts. A loud 18 watts, that could be used for a gig, and even unmic'd gigs. But Do Not expect a clean sound. The amps natural overdrive is the best thing about this amp. It compresses beautifully and allows guitars especially single coils to breath and shine through. Due to the fact it runs so hot it does sizzle a bit at gig volumes but nothing distracting. Using a reverb pedal is a bit hard as it increases the noise at higher volumes.... but what you get is GREAT overdrive. With pedals its great, overdrives especially. Fuzz (in my case a EQD tone reaper) can get a bit muffled (but you just have to correct with settings. Dr Z Maz 18. 18 watts. more like 30. More volume, but not a great deal more. slightly cleaner, gives great edge of breakup sound, and if pushed with pedals (which is takes great) gets more mean. This is in my opinion for me a better gigging amp, seems to just cater to a gigging musicians on the go. Whie the ghia is more of a Studio amp (but still super gig ready. The Maz's reverb is noisy (probably a tube that needs fixing) which I will do soon. Other than that there is very little to criticise except the Tube Rectifier blew very quick, and so did the Tube rectifer in the Carmen Ghia. All in all Both are great amps, I think I prefer the Maz a bit more for its open dynamics and being a little less compressed. the ghia would work for a band, but a very specific sound, while the Maz genre hops a bit more in my opinion. Advice: get both heads and one cab... then you have both in an easy etup, get them second hand.