You'll hear the Mark IV can do anything from some of the forumites, but I don't think it touches the DR for what it does. The Mark IV always sounds like a Mark IV, the Dual Recto is has such a huge array of tones available that people don't like them, the DR is a lot harder to dial in than the Mark IV IMO and has a lot available. The Mark IV and DR are voiced differently and compliment each other very well, and there is a tiny middle ground where they can meet, but they really are polar opposites when it comes to where they go from the middle. The DC series was suppose to be the middle ground between them, but I don't think it is, it's amazing for what it does though. Good luck