The verdict

Idle power
Corsair AI Workstation 300 idles lower (15W vs 25W) - cheaper to run 24/7.
Networking
ASUSTOR Lockerstor AS6804T has more NICs (2 vs 1) - better for a firewall or VLAN trunk.
RAM ceiling
Corsair AI Workstation 300 takes more RAM (128GB vs 64GB).
Local AI
Corsair AI Workstation 300 has a PCIe slot for a low-profile GPU - the other needs a DIY build for local LLMs.

Which wins for each job

Job ASUSTOR Lockerstor AS6804T Corsair AI Workstation 300
Plex / Jellyfin ~5 streams ~5 streams
Frigate NVR add a detector add a detector
Proxmox / VMs - 54,895 PassMark win
Firewall / router 2 NICs win 1 NICs
Local AI / LLM no slot PCIe GPU slot win

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 ASUSTOR Lockerstor AS6804T Corsair AI Workstation 300
Price (list) $1,299 $1,999
CPU AMD Ryzen Embedded V3C14 AMD Ryzen AI Max+ 395
Cores / threads 4 16
PassMark - 54,895
iGPU Radeon (RDNA2) Radeon 8060S (RDNA3.5)
NICs 2 1
NIC model Marvell AQC113 10GbE Realtek 5GbE
RAM max (GB) 64 128
M.2 free 4 1
PCIe slot none x4
Idle (W) 25 15
TDP (W) 15 120