Need help in tarot 680 pro!

I am trying to mock up by using Tarot 680 Pro. There are two different type of motor i am choosing to use. They are Turnigy Multistar 3525-650Kv 14Pole Multi-Rotor Outrunner and Turnigy Multistar 4220-650Kv 16Pole Multi-Rotor Outrunner. What are the different between this two motor?


They are running on max current 17A. So do I use a Multistar 20A or 30A for it? If so, anyone know what is the AWG wire that both of the ESC running on?
 

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