Hu,I've done hundreds of hours of research and trial-and-error testing over the years and, while I have no experience with some of the items you mentioned, I can tell you where I ended up. I have the Aonic 4 also. For almost all of my daily listening I use the TW2. For cable and a bit better sound I use the FiiO BTR-5 (BTR-7 is also out now). I'm very happy with the TW2 sound quality. For EQ, just for a little bass boost, I use Flat Equalizer from Beat Blend Labs on my Android phone. And perhaps most importantly, for tips I use AZLA SednaEarfit Crystal Standard.
I was leery about the sound quality of the TW2 after comparing to the BTR-5 at first, but was persuaded by members here that the conveniences would overwhelmingly outweigh any minor difference in SQ and they were right. I never think about it. I do exercises and martial arts etc so having no cable is a plus, but even still I'm very happy with the SQ. That Flat Equalizer works great, better than the one with the Shure PLAY app. The BTR is superb.
And man oh man the virtues of the right tips means everything! Try the ones I suggested! I did TONS of research and then trial-and-error on tips alone (good hundred-plus hours just on tips, discarded dozens of types before finding this). Be sure to buy the size you think you need and also the size up and the size down, and experiment with fit until you find the ideal fit for a very good seal. The tips should be comfortable in your ear and yet seal so well it might even make a "pop" sound when you remove it. And it might take a different size for each ear, which is not uncommon.
By the way, the RMCE-BT2 is in my opinion a waste of time. Why would anyone even consider it? I've used it and thrown it away. Very disappointing. BT sound quality is poor and the form factor is very inconvenient.
If you can afford it, the TW2 will make you very happy if you combine it with the EQ and tips I suggested. And I'm sure for a cable the BTR-7 will have you even a bit happier.
Thank you for taking the time as well!
I can afford the TW2 - now it's only the question if I want to.
But the other option beeing the MW200 is about the same, so it doesnt really matter much.
I'm quite unsure, if I enjoyed having TWS, without a cable to pull one out quickly - this is probably unnecessary with transparent mode now.
On the other hand, I like to dangle both around my neck, so I dont have to store them away, when not in use for a short time?
(I always could add a string, I know).
What's your take on this?
Back in the day I compared many tips myself (teen, limited budget, with SE 215)
I settled on the comply foam tils, the former rounded/olive shape. They had a perfekt seal, and best low end. Mid a little too warm, highs missing - but i blamed the 215s for that (mostly).
Did you compare the crystal tips to those?