Same Wi-Fi and WAN. The TP-Link costs more - for USB, a port and VPN.

Short answer

Archer BE400 - USB 3.0, 4 LAN, VPN. Mercusys MR37BE - the same Wi-Fi for noticeably less.

Key differences

SpecMercusys MR37BETP-Link Archer BE400
Typerouterrouter
Wi-FiWi-Fi 7, BE6500Wi-Fi 7, BE6500
Wi-Fi speed688 + 5760 Mbit/s688 + 5764 Mbit/s
Bands2.4 + 5 GHz2.4 + 5 GHz
WAN1 × 2.5 Gbit/s1 × 2.5 Gbit/s
LAN1 × 2.5 Gbit/s + 2 × 1 Gbit/s1 × 2.5 Gbit/s + 3 × 1 Gbit/s
USB—USB 3.0
MeshEasyMeshEasyMesh
MLOyesyes
VPN—yes
Pricecurrent pricescurrent prices

Specs come from the device pages on Smartphone.ua.

What's the same

Wi-Fi 7 BE6500: 688 + 5760 Mbit/s, MLO, EasyMesh, 2.5 Gbit/s WAN.

Ports

LAN 1 × 2.5 + 2 × 1 vs 1 × 2.5 + 3 × 1 Gbit/s.

USB and VPN

On the BE400.

Verdict: who should buy which

  • USB and VPN - TP-Link Archer BE400.
  • Saving money - Mercusys MR37BE.

FAQ

Is the Wi-Fi the same?
Yes, BE6500.

Can you build a mesh?
Yes, EasyMesh.

Which is cheaper?
The Mercusys MR37BE.

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