For what it's worth, the Tesla/J1772 "snake" adapter was made using the corded design to reduce leverage placed on the charge port. The charge port is bonded to the carbon fiber panel, so the CAN adapter is an extension, which could act as a lever if you were to say, accidentally bump it while locked into the charge port.
I have the official Tesla J1772 corded adapter and the CAN Roadster to Model S adapter from Mr. Sharp. The J1772 works great but I rarely use it since I always charge at home. While away from home, the proliferation of Destination Charging locations for Model S/X has made Mr. Sharp's CAN enormously useful for Roadster,