Both are dynamic. The Focus has better and smoother midrange and more bass. I wouldn't try to compare the Aeris to the Focus SE because the Aeris has on board amplification and DSP room correction. Apples to Oranges.Actually I listened to the Signature SE, not the Focus SE. Have you compared those? Any thoughts about the mids in the Signature SE?
I just noticed that the Focus XD contains an on board amplifier but not DSP room correction. Interesting.