Pretty much, it's a comparison to legacy that has lost it's meaning.

The only comparison that really matters is functional comparison to one generation before - "Liu said TSMC's 3nm technology would feature an estimated 60 percent gain in density of logic transistors and reduce power consumption by 30 percent to 35 percent at the same rate compared with 5nm technology."

That's real deal. But the 5nm and 3nm classification, that's marketing term that has lost it's meaning.