Similar only in the sense that they are both well-balanced. One being BA-based and the other dynamic, they differ a fair amount in how notes are actually conveyed. I would never call the RE272 analytical, for example. I made some comparisons to the bass of to the CK10 in the RE272 review and for the most part they will hold for the DBA-02. They also apply to the rest of the spectrum - the DBA-02 is always crisp and immediate whereas the RE272 is always gentle and liquid.
i'm still considering the Crystal and the ck10. so i need a bit more info
being the Crystal a dynamic, is it vented? prone to wind noise?
as for the ck10. what's the problem you mentioned about the stock tips?
have you tried the ck100 foam on the ck10? or are the shure olives better in sound, comfort , isolation, etc?
No wind noise with the Crystal as far as I could tell.
The stock tips of the CK10 just don't work well for it. It likes foam or a deeper seal (e.g. triple-flanges). I never got to try the CK100 foam.
Great, glad you like them!