which video transmitter is better? Whats the difference?

Hello everyone! i'm building a 130mm micro carbon fibre frame quadcopter (lulfro FC, 8mm darkedition micro motor warehouse motors, FrSKY V5DM etc etc)

So now i'm starting to think about what FPV setup to use? What are the differences between these two transmitters? What makes one better over the other? I'm sorry i'm new to all of this.

[AltitudeRC - Nano 5.8G FPV Transmitter](http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=11_30_33&products_id=2284)

OR

[Team BlackSheep Greenhorn 5G8 (25mW) Transmitter](http://www.getfpv.com/team-black-sheep/team-blacksheep-greenhorn-5g8-25mw-transmitter.html)