The verdict

CPU
Radxa X4 has 1x the CPU throughput (5,320 vs 5,243 PassMark).
Plex
Radxa X4 transcodes more 4K HDR streams (~5 vs ~3).
Idle power
Radxa X4 idles lower (8W vs 10W) - cheaper to run 24/7.
RAM ceiling
Lenovo ThinkCentre M710q Tiny takes more RAM (32GB vs 16GB).

Which wins for each job

Job Lenovo ThinkCentre M710q Tiny Radxa X4
Plex / Jellyfin ~3 streams ~5 streams win
Frigate NVR ~4 cameras ~4 cameras
Proxmox / VMs 5,243 PassMark 5,320 PassMark win
Firewall / router 1 NICs 1 NICs
Local AI / LLM no slot no slot

Approximate - capacity estimates from curated specs, the same logic as the recommender. Verify against your exact setup. Prices move; check the retailer.

Full specs

Spec Lenovo ThinkCentre M710q Tiny Radxa X4
Price (list) $75 $80
CPU Intel Core i5-7500T Intel N100
Cores / threads 4 4
PassMark 5,243 5,320
iGPU Intel HD 630 Intel UHD (24 EU)
NICs 1 1
NIC model Intel I219-LM Realtek RTL8125 2.5G
RAM max (GB) 32 16
M.2 free 0 1
PCIe slot none none
Idle (W) 10 8
TDP (W) 35 6