Nice review as always. I generally agree, although I don't think RE0 and DBA-02 are really analytical. RE0 is a tubey, somewhat compressed sounding IEM that is certainly very detailed, but also balanced throughout the spectrum, except for the slight roll off in the sub bass. If you perceive it as thin and cold, then you are either used to bass heavy headphones or you are not getting a good fit. With the stock dual flange tips, RE0 leaves the balanced territory and enters the warm and sweet territory IMO. Plenty of bass punch and midrange presence with sweet, beautiful treble.
DBA-02 is balanced IMO, provided that you get a good fit. It is a bit emphasized in the bass and treble. It is forward and extremely detailed, analytical and musical all at the same time. It's not exactly sweet and there is some sense of coldness in the treble, but bass and mids are smooth and on the warm side. Treble is not as sweet as on RE0, nor as high quality, but very good. Mids don't have the same sense of warmth that RE0 has, but they are sweetened in a different way - they are brought forward and given extra fullness and air. In the bass, DBA-02 is trying to mimic dynamics and does it very well for a BA - there is definitely some dynamic-like rumble and texture present in the low end, unlike Etymotic ER4 for example, where the bass is very different from dynamics: clearly tighter and more controlled with modest impact only when it is present on the recording and is made possible by the quality of the source.
I agree that Etymotic ER4S is analytical, but the P is more colored and I would say mid centric. The bass is all there and present, but the dominating part of the spectrum with ER4P is the midrange, it is forward, engaging and extremely detailed but not agressive. The treble is a bit in the background compared to the mids. Not recessed, but not dominating in any way either. The sound of ER4P reminds me a lot of SE530, just a little less smooth and warm.