Oh wow, Soundmagic E10 brings back old memories, I think that was the first time someone said 'check the reviews on Head-Fi' ... yep, this is how I ended up here
Anyhoo, i know I liked the E10 that much that I bought a second pair, if I recall correctly, the soundsig is V shaped, ample bass and highs (basically what the 'loudness' button on old stereos was for)
One thing you did not mention, do you plan on using the TWS for working out? and do you sweat a lot ... In this case I would not go for the KZ T1, afaik no IPX rating. They have great sound, but the volume 'hump' can possibly annoying (there's like nothing between 30% vol and 65%) .... The Mpow T5 would match your wish for 'E10, just better' closest, but they do stick out a bit .. not Bose SSF bad, but yeah, they are out there.
The Anbes 359 (or now Kissral something) are really nice and flush and great sound. But you would possibly even be happy with the QCY T1 (tried them yesterday first time on a run and was impressed with the sound and the connection ... more stable connection than my Bose or Sony!) ...
And yeah, we all say 'only one more TWS'