What are the differences between the "CCD Member" and "Reallusion Member" accounts?
Is there any benefit difference between them?

Thank you!

The Reallusion Premium Members account is where you register your products and find patches, bonus content and discounts on upgrades.

The CCD (Certified Content Developer) is for those who wish to develop new content for iClone or Crazytalk. Here you will find plenty of developers docs, samples, plugins etc.

I hope this answers your question. :)