Which Satellite to add to a system with RBR50 and RBS50?

[wolfereeno]

Netgear'soverlapping products are so confusing.   I bought a 2 unit package that contains an RBR50 and RBS50.  I want to add a 3rd satellite.  Seems like the RBS20 is a cost effective option.  But whats the diff between it and the other various statellites?

Thx!

[CrimpOn]

The RBS50 has three sets of radios and antennas (separate antennas for the backhaul radios), whereas the RBS20 has only two sets (2.4G and 5G).  In practice, the backhaul speed is usually so great compared to the internet capacity that users notice no difference.