Do I still need an Android TV box if my Smart TV already has similar specs?

I’ve been wondering if it’s worth getting a separate Android TV box when my smart TV already runs Google TV with decent specs.

Here’s a quick comparison of what I have and what I’m considering:

Onn 4K Pro (Android TV Box)

CPU: Quad-core Cortex-A55 GPU: Mali-G31 MP2 RAM: 3 GB Storage: 32 GB

Xiaomi Box S (3rd Gen)

CPU: Quad-core (up to 2.5 GHz) GPU: ARM G310 V2 RAM: 2 GB Storage: 32 GB

Xiaomi TV X Pro QLED (Smart TV)

CPU: Quad-core A55 GPU: Mali-G52 MC1 RAM: 2 GB Storage: 32 GB

All three devices run Google TV (Android 14). So my question is — with these specs, do I really need a separate TV box? Would the Onn 4K Pro or Xiaomi Box S actually perform better than the built-in Google TV on my Xiaomi TV X Pro?