There are some very distinct similarities between the PRS Archon and the Mesa Rectifiers. There are also some very distinct similarities between the Mesa Rectifiers and the Carvin V3's. In my assessment, the biggest difference between the the Archon and the Rectifiers is the DEPTH knob that you find on the Archon. To be dramatic, I think of the depth knob as an often overlooked secret tone weapon.The Recto's don't have a depth knob and thus are limited in that way. The V3's have a depth knob like the Archon and have remarkably similar abilities. Between the Archon and the V3 or the V3 micro, is that I think the Archon is made better, simpler to operate and smaller.
There was a time when I thought about replacing my V3 with a Recto but I learned that Carvin made the V3 with the intent of competing with the Recto's and determined that the V3 I already had was better than the Recto's. I have since replaced my 100w V3 with a 100w Archon and I love it! But I still have a 50w V3m as a backup due to the fact that I already have it and the cost of getting another Archon. That being said, I'm still thinking about getting an Archon 25 combo because I like the Archon so much.