The consumer facing names for those transmission specs are and have always been:
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SuperSpeed 10 Gbps
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SuperSpeed 20 Gbps
Unless you’re designing your own circuits you don’t need to worry about signaling rates (ie “Gen”) or lane configuration (Z×Y).
They are a Silicon Valley-based foundation half-heartedly rehashing Silicon Valley’s worst trends.
The truth is, you have to do these sorts of things to attract and retain talent, even if they aren’t great ideas.