Gnss antenna

Is it okay if I buy one of this product on the tractor?

TRY 991.50 20%OFF | TOPGNSS, yüksek hassasiyetli RTK GNSS anten ZED-F9P tarım GPS anten yüksek kazanç UGV anten TNC 3-16V GNSS GPS GAL BDS,TOP500

So I’ve been trying to do some reading on gnss antennas. I’ve been using an Ardusimple patch, and they’ve been working fine, both as a base and rover. The main reason I would use their survey antenna would be portability as the cable is detachable.

So my question is, how do you guys know what’s good or possibly an improvement, and what’s overpriced garbage. There is all kinds of stuff.

Beitian BT-160
Beitian BT-300D
Topgnss Top500

What’s the real world difference. From what I can find the 160 and 300d are basically identical.