thanks! very informative and provided new insights. the reason i had my eye on Diva was due to the tier lists of Gizaudio, HBB, ShuwaT, Precogvision, etc., but now it's beginning to shift toward the Impact (which sadly no mainstream reviewers have heard). Currently, I use the Mest Indigo with mostly neutral DAPs or USB laptop DAC but I want to get an IEM that highlights vocals with a wow factor (i.e., avoid good IEMs like the U12t which is high scoring when consciously evaluating it, but bland/dry/neutral/plain to any non-audiophile looking to just enjoy their music).
So far, all my gear (headphones/earbuds/IEMs) are either neutral, warm, U-shaped, or V-shaped. I don't have any gear highlighting vocals and Gizaudio mainly got me hunting for a vocal IEM.
It sounds like both Impact and 10th can handle multiple genres, but the Impact has the extra sauce. 10th in that case might not impress me (enough) since I'm used to the Indigo's techs already.
It sounds like the Impact will not lose out much of the technicalities I'm used to with the Indigo, while highlighting vocals with a wow factor on first listen. Extra pros are probably smaller nozzle diameter and shell size.
I still have time to research because I'm waiting for new eartips to arrive in a few weeks which were recommended by another Indigo owner for boosting Indigo's vocals and resolution, so I at least won't be pulling the trigger soon.
Isabellae could be a contender given it's price is comparatively lower than the Diva and Impact (similar to the 10th) but that one review saying it lacks extension on both ends means I need to research more about it.
Note: i will say for reference that gizaudio ranked monarch mk2 at #3(?) for vocals but the monarch mk2 didn't wow me.