Cyan is firmware. WP is the OS. They can be updated independently, within limits - for example, 8.0 on Cyan isn't supported, might not work well, though we don't know since Microsoft hasn't given us a way to get that configuration. Cyan with 8.1 for production updates from Black with 8.0 was a packaging choice for Microsoft. Plugging Cyan in under 8.1.1 DP is another packaging choice that they're now providing.