Just to follow up on that, replacement arrived, ~this one identifies as 'USB Microphone'. Seems otherwise~ [edit: I mis-remembered which way around it was, they're both 'USB Microphone' on macOS, and both 'Blue Snowball' on Linux] identical, I think my assumption is still that both products are manufactured (genuinely) by the same factory, and the design even perhaps farmed out so they really are identical on the inside, but either way just flashed with the wrong ID.
Both of these two are identical inside too, same board revision even. (And not every penny pinched like you would if you were faking - gloss black solder mask, as well as on a second PCB whose only job is keeping wires tidy and displaying a silk screened revision number.)
[edit: Further to edit above, it's actually 'C-Media Electronics, Inc. Blue Snowball', and the main chip is this one: https://www.cmedia.com.tw/applications/microphone/CM6327A so presumably both microphones use it and the same assembly house (whether the same design or not) and the EEPROMs' manufacturer/product strings are either getting mixed up or all Blue, whether by mistake or assembler realised they could get paid double to flash once.]
Both of these two are identical inside too, same board revision even. (And not every penny pinched like you would if you were faking - gloss black solder mask, as well as on a second PCB whose only job is keeping wires tidy and displaying a silk screened revision number.)
[edit: Further to edit above, it's actually 'C-Media Electronics, Inc. Blue Snowball', and the main chip is this one: https://www.cmedia.com.tw/applications/microphone/CM6327A so presumably both microphones use it and the same assembly house (whether the same design or not) and the EEPROMs' manufacturer/product strings are either getting mixed up or all Blue, whether by mistake or assembler realised they could get paid double to flash once.]