Any comparison to the DR Pure Blues I'm using now?
Based on my limited experience with the Pure Blues, the BNs are noticeably firmer (in a good way) than any of the DR round cores, which I found to be a little too loose for my taste.
In terms of the tone, I remember the PBs to be pleasantly warm right out of the package like the BNs, but without the full-bodied bottom the BNs have.