Are you talking about the modules in Mouser? Intel intel edison module | Mouser
Or are you talking about Release 1 and Release 2?
If you are talking about the modules in Mouser, the difference between them is more certifications in order to sell it to more countries around the world.
But if you are talking about Release 1 and Release 2. The Release 2 has updated packages and it has more features for Bluetooth and Wireless.
I hope this answer your question
Yes, I was referring to the EDI2 Edison 2 items from Mouser.
Thank you CMata, this answered my question.
I now see that this was already covered in the previous post What is the Difference between the Edison 1 and 2