They changed the name to put the width in the name, so the B3 became B83, B2 became B78, etc.
That only lasted one year (I think) but there is still new-old-stock out there (and at pretty good deals).
Then they replaced the line with the Phantoms, but they are not really the same thing -- different widths, different core material, probably other changes. The closest correspondance is probably the Phantom SC 87.
I have B3's myself. I have not tried the Phantoms (other than the 104 which is totally irrelevant to this question).