I have a Fly sky TH9x transmitter which has come with a Flysky FS-R8B 2.4GHz 9CH receiver.Needed additonal receivers but only Flysky FS-R8B 2.4GHz 9CH is available.

1) Is Flysky FS-R8B 2.4GHz 9CH compatable with TH9x
2) Whats the difference between these two receivers.Which one is better

Can experts help me make the buying decision

rgds

Arun