Well, the two of us already had the discussion around SQ differences between the DAC chips. For me, there is not much difference. Still I like having both options because I like having more battery life (ESS) as well as more power (AKM). The later when I’m in the mood to listen to my full size headphones. Honestly, I even plug my ODIN to the AKM side, although not needed. Just for the good feeling to feed them with max power
4.4mm is a nice addition and will become industry standard. Personally, I own two EE IEMS, both with 2.5mm and for my full size headphones, I own a very nice DD adapter that plugs in both ports 2.5 & 3.5 together for stability, power / sound comes from the 2.5mm. So, don’t care.
Forget about the increased battery by 100mAh, that’s neglectable. Will it charge as fast as SE200? The later is extremely fast imo.
The better screen is definitely a plus, still the lower res of the SE200 has also advantages as it is already sharp enough (well, for me at least) and the new one will consume more battery. Plus, Canvas looks better on the SE200. I compared with my iPhone 11Pro and Spotify canvas looks worse with ultra high resolution screens
Least important, but still... SE200 looks better and is less error prone due to the lack of moveable replacement parts like the modules.
No need to envy the little brother, in my opinion.