You are comparing base vs boost speeds though.
The TR is 4.2 base with 5.3 boost. The fastest Epyc (9174F) is 4.1 base with a 4.4 boost. Big difference.
Maybe I missed it, but did you test the m.2 drives? I'd be curious to see the results. It looks like they are pumping 4 drives through a x4 slot. Are they using a switch chip or just giving each drive a single lane?