Many had the same question about doing Princess and Tink - did we get just the pink Coast to Coast or both the pink and blue? In 2016, many people reported getting both, but it was attributed to a "mistake" of Kessel Run recipients getting both. At Tink check-in this year I was given a pink wristband ONLY. I read on here that some people had gone to runner relations and asked for the blue wristband and had received it, so decided to give it a shot. I was prepared to be told no and leave it at that, but they gave me the blue one, no questions asked. At the end of the Half, I received both C2C medals.
Based on this experience, my guess is the official line is you only get Kessel Run for doing both Star Wars races, but if you ask or make noise, they'll give you both. Who knows next year, though?