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Re:Apple Silicon M1 chip in MacBook Air outperforms high-end... by YetAnotherNick on Thursday November 12, 2020 @10:02AM (#25070584)
They are not even of same series. 3700U(fastest Ryzen 3000 15W processor) single core is 57.5% of 3700X(not the fastest Ryzen 3000 desktop).

Source:

[1]: https://browser.geekbench.com/processors/amd-ryzen-7-3700x

[2]: https://browser.geekbench.com/processors/amd-ryzen-7-3700u

Re:Apple Silicon M1 chip in MacBook Air outperforms high-end... by trynumber9 on Thursday November 12, 2020 @10:53AM (#25071123)
AMD's naming scheme has mislead you.

Renoir is 7nm Zen 2 aka the 4000 series. https://en.wikichip.org/wiki/amd/cores/renoir

Matisse is also 7nm Zen 2 aka the desktop 3000 series. https://en.wikichip.org/wiki/Matisse

Picasso is 12nm Zen+ aka the mobile 3000 series. https://en.wikichip.org/wiki/amd/cores/picasso