Testing out the eb2s pro now. I can hear an impressive amount of detail and it does sound similar to the yuin pk2 and ksearphone lbbs. The problem im having is that the fit is quite bad, at least for me. It might be that the drivers are slightly bigger (15.4mm) or the shape of the shell, but i can feel the earbuds and they feel like they are blocking up my ear. Its a very distracting feeling.
I think i have smaller ears than on average though, so it might not be the earphone's fault.
Which is a shame, it sounds really good (except for the bass), and considering the price is about USD $25, its amazing. I can live with sub par bass, but the fit and comfort might be a deal breaker for me.
I do think my pk2s sound better though, although im not sure if they are real pk2s or have been damaged as they are a very old pair. they are the "new" version with the gray logo (the original uses white). one thing i noticed when doing a comparison is that the PK2s sound much "louder" at the same volume, especially with stuff like drums.