Boy are you in luck. I actually have both of those exact same cables. I got impatient waiting for Atlanta Hobby's so I ordered the one from ReadyMadeRC. Turns out, they both showed up the same day. ANYWAY... The two differences are: RMRC cable: (1) Charges the GoPro battery. This means the GoPro will drain your LiPo and therefore your flight time. Not desirable since the GP3 battery should outlast a whole day's worth of recording multiple flights and multiple LiPo's. (2) Exposed cable AH cable: (1) Does not charge the GoPro battery which means more flight time. (2) Has a nice white sheath around the cabling, making it a little nicer to look at and a bit more protected than an exposed cable. I hope this information serves you well.