- Amp tone & feel, also taper of the parameters have noticable improved to a much higher grade of accuracy.
- One CPU only for Effects, the other calculate the two Amp Sims. This free up a huge amount CPU Power for more Effect-Blocks in your virtual Pedalboard (Ultra just one CPU)
- X/Y function (only Axe-II) is fully MIDI controlable. In fact this could double the amount of switchable effects on your virtual pedalboard, can be used for A/Bing things and more ... (imagine 4 switchable Amp channels in one preset ....) , i won`t miss that!
- SCENES function (only Axe-II), it`s like a progammable MIDI Switching system for all the effects on your "board", i won`t miss that!
- 100 nameable User Cab Blocks in the II vs. 10 unnamable in the Ultra. More and better Factory Cab IRs.
- Tonematching, IR-capture tool, bigger display, 10 "global Blocks" for every FX-Block type, Headphone-jack, Quick controls ...
In one word: The Axe-II is not just an "upgrade". It`s with it`s Firmware updates in the meanwhile a totally different league & on a much higher level than the Ultra. IMHO