I thought it was certainly comparable. When you have two tones dialed in right it adds so much to your tone. I have an axe ultra as well and I get the same stereo effect using two eleven racks as I do using dual amps in the Axe. I'd run both outputs into a single 12" alto ts112a and they would be blend nicely. If you're thinking about picking up another 11 for cheap, and you're in the US, let me know I have one for sale and can work something out with out.