The third easiest way to hear the difference is that MQA is slightly hotter or louder. The MQA apodizing filter tends to compress transients.
This part I heard, but since I was able to switch it off with non MQA I attributed it to the filter and not to MQA itself.
I heard it more as a softening of transients and removing of space.
Whatever difference I heard with MQA, none of it was worth money. I would not pay a premium for it. My feelings are pretty close to what I later would read from PS Audio:
https://www.psaudio.com/pauls-posts/mqa-thoughts/
Best,
E