The verdict

CPU
Beelink EQR6 has 1x the CPU throughput (18,159 vs 18,053 PassMark).
Plex
Beelink EQR6 transcodes more 4K HDR streams (~5 vs ~3).
Idle power
Beelink EQR6 idles lower (10W vs 12W) - cheaper to run 24/7.
Networking
Beelink EQR6 has more NICs (2 vs 1) - better for a firewall or VLAN trunk.

Which wins for each job

Job Beelink EQR6 Lenovo M75q
Plex / Jellyfin ~5 streams win ~3 streams
Frigate NVR add a detector add a detector
Proxmox / VMs 18,159 PassMark win 18,053 PassMark
Firewall / router 2 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 Beelink EQR6 Lenovo M75q
Price (list) $279 $280
CPU AMD Ryzen 5 6600H AMD Ryzen 5 PRO 5650GE
Cores / threads 6 6
PassMark 18,159 18,053
iGPU Radeon 660M (RDNA2) Radeon Vega 7
NICs 2 1
NIC model Realtek RTL8111 Realtek 1GbE
RAM max (GB) 64 64
M.2 free 1 0
PCIe slot none none
Idle (W) 10 12
TDP (W) 45 35