This is very late and perhaps you moved the conversation elsewhere but:
Zike Drive w\WD Black SN850x using CrystalDiskMark test on Framework 13 13th gen intel using 10gb, 20gb, 40gb cable:
10gb: R=1083MBps W=1061MBps
20gb: R=1906MBps W=1452MBps
40gb: R=3816MBps W=3192MBps
Also tested with an Airusan SSD enclosure that uses the same ASM2464PD chip the Zike Drive uses. Test results were essentially identical.
Tested with many cables, differences were negligible.
The results vary wildly depending on the SSD used but that’s an issue with the ASM2464 not the Framework. I’ve only achieved these results with SN850x. Other high end 4x4 SSDs like the Samsung 990 Pro had miserable write speeds in the Zike Drive either in the Framework or other USB4\Thunderbolt ports.
Also, Thunderbolt 4 ports on various desktop motherboards have only gotten to about 3100 R/W with the same tests as above.
Also: tested in different ports on Framework, as expected same results.