What is the difference between Bitshares and Bitshares X?

[santaclause102]

have a look here https://bitsharestalk.org/index.php?topic=2166.0

[70231f697a2b3c2b]

I've noticed in a few places on the forums, as well as on the I3 website, there are references to "Bitshares", and separate references to "Bitshares X".  It seems like these are two different things.

What is the difference between Bitshares and Bitshares X?