I only have the dusk and haven’t tried the OG Blessing 2 but it looks like it has about a 5 decibel rise in bass.. Other than that they’re pretty similar I think so maybe it doesn’t make sense to own both but maybe the Dusk is tuned more to your liking.

I haven’t tried the S12 but it seems like it’s one of the best in its price range. The B2 is also probably the best in its price range (I love my B2D! Blown away to own an IEM this good) so I probably wouldn’t want to go with a cheaper IEM either.