Here are the rules changes from the KS:
Contract cards last longer in the new edition. In the previous edition, each Contract was discarded after the Show round. In the new edition, at the end of the Show round, each Contract card is flipped to the other (weaker) side, or discarded if it was already flipped. This change makes a Contract strategy stronger and much more interesting.
New rule - Bankruptcy. If a player can't pay off their Credits and/or Loans, they will be forced to take more Loans, which they will have to pay for every round, and pay off (if able) during the next Show round. This may lead to Bankruptcy at the end of the game if a player is unable to pay off all their outstanding Credits and Loans after the Final Show round.