The verdict

CPU
GMKtec EVO-X1 has 1.7x the CPU throughput (34,991 vs 20,140 PassMark).
Plex
Beelink SEi14 transcodes more 4K HDR streams (~8 vs ~5).
Idle power
GMKtec EVO-X1 idles lower (8W vs 33W) - cheaper to run 24/7.
Networking
GMKtec EVO-X1 has more NICs (2 vs 1) - better for a firewall or VLAN trunk.
RAM ceiling
Beelink SEi14 takes more RAM (96GB vs 64GB).

Which wins for each job

Job Beelink SEi14 GMKtec EVO-X1
Plex / Jellyfin ~8 streams win ~5 streams
Frigate NVR ~6 cameras win add a detector
Proxmox / VMs 20,140 PassMark 34,991 PassMark win
Firewall / router 1 NICs 2 NICs win
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 Beelink SEi14 GMKtec EVO-X1
Price (list) $679 $720
CPU Intel Core Ultra 5 125H AMD Ryzen AI 9 HX 370
Cores / threads 14 12
PassMark 20,140 34,991
iGPU Arc (Xe) Iris Xe class Radeon 890M (RDNA3.5)
NICs 1 2
NIC model Intel I226-V Realtek 2.5GbE dual
RAM max (GB) 96 64
M.2 free 1 1
PCIe slot none none
Idle (W) 33 8
TDP (W) 28 65