How to distinguish rev. B0, rev. C0 and rev. C1 board?
Simply check the serial number on the back side of board.
Rev.B0

Rev.C0

Rev.C1

What are the parts changed?
The EPCS device has been changed to EPCS64. Starting from rev.C1.
The EPCS device has been changed to EPCS64. Starting from rev.C1.