Nope — footprint, yes, height no.
Nope, not the same.
Seems there's some confusion, perhaps because Tayda and others are using Hammond nomenclature to describe non-Hammond products.
To clarify, from the Hammond Datasheets:
| HAMMOND MODEL | EXTERNAL HEIGHT in millimetres |
| 1590BB | 34 |
| 1590BB2 | 37.75 |
| 1590BBS | 42.1 |
Tayda's interpretation of a BB2 is listed as being 38mm tall, but the BB
2 is
NOT equivalent to a BB
S.
Since most of the PPCB projects are sized for 1590N1, most people here will be familiar with the height of an N1 (125B

) — 39.8mm.
(125B varies manufacturer to manufacturer, but is usually within a millimetre or two of the Hammond N1.)
Incidentally, the Tayda "BB" is listed as only 3
3mm, compared to Hammond's BB at 3
4mm.
I can say that single millimetre often makes a difference to me in many of my over-crammed builds.
By comparison to either Tayda's or Hammond's "BB" enclosures, the difference between a BB2 and BBS is huge.
As Passinwind mentioned in post #22, Tayda does not carry the BBS.