Okay. I did some additional listening of Anni with Martini cable across multiple genre of music. The big difference between N8ii and M2 is that N8ii is very tight and clean like a studio recording. M2 has a bigger sub bass emphasis and sounds more like listening to music in a Club with boosted bass. Both sound great. Depends on preference. I like both.
In listening to very bassy music like modern pop, Soul and R&B music, I am liking N8ii more because I like a more controlled bass for this genre of music.
When I go to Rock, I am mostly preferring M2, but sometimes N8ii and it depends on what a specific track needs to sound best. For Sultan of Swing, I prefer M2 with this track. Sound is a bit more forward and lively. N8ii sounds a bit too clinical. For Boston More than a Feeling. Same impression. Now, Sheryl Crow. All I Wanna Do. This sounds better with N8ii because the cleaner presentation is nicer to my ear.
Switching to Classical. Mozart Violin concertos. Much prefer M2. Has a slightly darker tonality than with N8ii. Instrument separation is far better with M2. I prefer Anni this genre over the prior 2.
So, it's a split decision on which I like more for Anni. It is probably also different when paired with Venom. I'll wait to get RS8 to do more testing.
Awesome rundown...very helpful thanks.