Sanwa exzes x vs z
 

Hello chaps, I'm looking to change from my trusty Futaba 3gr
I'm looking to try to pick up a Sanwa exzes x or z, probably the x due to the price difference
My question is what is the difference in the 2 transmitters? Is the z a much better handset? To be honest I'm looking for the benefits of telemetry, just a good quality item
Cheers