The verdict

CPU
Minisforum MS-A1 has 2.1x the CPU throughput (31,519 vs 15,230 PassMark).
Plex
Minisforum MS-A1 transcodes more 4K HDR streams (~5 vs ~4).
Idle power
Lenovo ThinkCentre M90q Gen 2 idles lower (12W vs 15W) - cheaper to run 24/7.
Networking
Minisforum MS-A1 has more NICs (2 vs 1) - better for a firewall or VLAN trunk.
RAM ceiling
Minisforum MS-A1 takes more RAM (96GB vs 64GB).
Local AI
Lenovo ThinkCentre M90q Gen 2 has a PCIe slot for a low-profile GPU - the other needs a DIY build for local LLMs.

Which wins for each job

Job Lenovo ThinkCentre M90q Gen 2 Minisforum MS-A1
Plex / Jellyfin ~4 streams ~5 streams win
Frigate NVR ~4 cameras win add a detector
Proxmox / VMs 15,230 PassMark 31,519 PassMark win
Firewall / router 1 NICs 2 NICs win
Local AI / LLM PCIe GPU slot win 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 M90q Gen 2 Minisforum MS-A1
Price (list) $260 $259
CPU Intel Core i7-11700T AMD Ryzen 7 8700G
Cores / threads 8 8
PassMark 15,230 31,519
iGPU Intel UHD 750 Radeon 780M (RDNA3)
NICs 1 2
NIC model Intel I219-LM Realtek RTL8125
RAM max (GB) 64 96
M.2 free 1 1
PCIe slot x8-lp none
Idle (W) 12 15
TDP (W) 35 65