ASS with MM90 is one of the best combination add a Piezo and you will have one hell of a good guitar. I have 2 guitars with MM90 that I love to death and would probably never part with unless I will be forced to
The poplar body of the Morse gives a neutral sound. The Axis is much more aggressive. The combination of the maple top and the MM90 gives you more top end.
The Morse sound is more in the medium.