The RK3588 doesn’t beat the N100 in anything but throughput - I have been benchmarking a number of SBCs lately to consult on building custom industrial edge devices and in terms of bang for the buck and PCI lane availability (as in actually accessible lanes) the Rockchip designs work out a little cheaper. I have one of those 4xNVMe NAS boards to test next, and expect it to be pretty snappy for the same wattage-but it all depends on the use case.

(I also have an X4, am waiting for an SSD for it for proper testing)