When comparing ESPRESSObin vs NanoPi M4, the Slant community recommends ESPRESSObin for most people. In the question“What are the best single-board computers?” ESPRESSObin is ranked 33rd while NanoPi M4 is ranked 46th.
Ranked in these QuestionsQuestion Ranking
Pro Fast SATA III port
Pro Das U-Boot bootloader
It uses the opensource boot loader "Das U-Boot".
Pro 3x Gigabit LAN
It has three Gb ethernet ports.
Pro Mini-PCI-E slot
Few SOC boards have this feature--and there are a couple Mini-PCIE RAID cards on the market that might work nicely
Pro 6 core HexaCore, compact nvme extender, 4GB RAM
Pro Open Source
Works with mainline Linux kernel and open source Mesa Panfrost drivers.
Pro Many ports
4 x USB3
2 x USB2 available via pins
PCI-E available via pins
Rockchip 3399 with two fast A72 cores. Good heatsink limites throttling.
Con Only one SATA port
It has only one SATA port.
Con Bleeding edge...
To have mainline kernel requires a bit of tinkering (e.g. installing Armbian). Panfrost drivers for 3d acceleration are not mature and crash sometimes...