Request information about Trimble R4s GNSS receiver

I want to purchase a GNSS receiver, and I found two receivers the first called Trimble R4s and the second is Topcon Hiper V.

Iƒ??m trying to collect information about Trimble R4s receiver. After search about Trimble R4s, I found.

• Trimble R4s data sheet

https://optron.com/trimble/products/r4s/

• Trimble R4s looks like Spectra Precision SP60

https://spectrageospatial.com/sp60-gnss-receiver/

I will be pleased if anyone give me information about Trimble R4s and a comparison between Trimble R4s and Topcon Hiper V.