The C5 and C7 launched exclusively to China and as yet, have not made their way to other markets. With this in mind, it's relatively doubtful that either the C5 Pro (SM-C5010) or the C7 Pro (SM-C7010) will branch out beyond the People's Republic. There's no word on the specs as yet, but if other 'Pro' releases from Samsung are anything to go by, we can expect a reasonable under-hood refresh.
As a reminder, both the Galaxy C5 and C7 bundle a decent collection of internal hardware. The former is equipped with Qualcomm's Snapdragon 617 SoC, 4 GB of RAM and 32GB of expandable storage. The C7, meanwhile, includes a the Snapdragon 625 SoC, 4 gigs of RAM once more, and 32 or 64 GB of expandable real estate. Both include fingerprint scanners, and while the C5's 2600 mAh battery is out-sized by the 3300 mAh juice pack of the C7, both include support for fast charging.
There's also not much info on when the Pro models will arrive. When they do, however, they could be accompanied by the Samsung Galaxy C9 spotted on Zauba with its monstrous 6-inch display. Since these C series handsets have passed through the FCC in recent times, there's at least some hope they could make it to the United States at some point.
Galaxy C5 Pro
Galaxy C7 Pro