The verdict

CPU
Aoostar WTR Max has 1.4x the CPU throughput (28,612 vs 20,140 PassMark).
Plex
Beelink SEi14 transcodes more 4K HDR streams (~8 vs ~5).
Idle power
Beelink SEi14 idles lower (33W vs 38W) - cheaper to run 24/7.
Networking
Aoostar WTR Max has more NICs (4 vs 1) - better for a firewall or VLAN trunk.

Which wins for each job

Job Aoostar WTR Max Beelink SEi14
Plex / Jellyfin ~5 streams ~8 streams win
Frigate NVR add a detector ~6 cameras win
Proxmox / VMs 28,612 PassMark win 20,140 PassMark
Firewall / router 4 NICs win 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 Aoostar WTR Max Beelink SEi14
Price (list) $659 $679
CPU AMD Ryzen 7 PRO 8845HS Intel Core Ultra 5 125H
Cores / threads 8 14
PassMark 28,612 20,140
iGPU Radeon 780M (RDNA3) Arc (Xe) Iris Xe class
NICs 4 1
NIC model Intel X710 10G SFP+ plus Intel I226 2.5G Intel I226-V
RAM max (GB) 96 96
M.2 free 5 1
PCIe slot none none
Idle (W) 38 33
TDP (W) 54 28