I think you're better off trying both and concluding for yourself. Frankly, I expected SM3 to blow me off with it's "massive" sound stage initially. But, it does not have a massive sound stage like the width of RE1, depth of TF10 combined. What it does is filling up the space better, giving you the illusion of the massive space it has got to position things. Let's say the total stage is like 8 rows. Because SM3 has a thicker sound, the vocalist is almost occupying the first two rows, then it positions a guitarist in 3rd row. Due to the thick notes, each note is like a fat man occupying two seats together. It then places a cymbal strike in #6 and #7, a fading effect in row #7-8. Now, many seats are filled within your imaginary head-itorium. With DBA-02, a lean sounding IEM, the vocalist is in row #2, guitarist is in #5, cymbals sound unattached at row #8. Since it's thin, it does not have the fat man, each sound occupies only one seat in each row. It would look vacant compared to SM3 for sure.
I just did a short A-B between SM3 and DBA-02. Played Opeth's "Dirge for November" (Blackwater Park) in SM3 first, DBA-02 next. This is what I felt on going to DBA-02 : Mids and Vocals sound thin & recessed, but it's fast, drums sound natural.
Then, after a short break, I played A Perfect Circle's "Brena" (Mer De Noms) in DBA-02, then SM3. When I played it in the DBA-02, the cymbals sounded fast, forward and had a great impact. It's positioning from left to right and front to back was indeed very good. When I switched to SM3, I found treble to be very recessed, the cymbals no longer having the impact as they are positioned far off me, no match to DBA-02. But, mids sound rich, bass has more body and impact. The "fat man" is at work here, giving you a very nice stage filled with all the items, but without poaching on each other's space.
Guess that sums up my quick A-B.