The Knight and the Courtesan, while keeping their appearance from ACB, were given different names and backstories in ACR. Fiora Cavazza became Fabiola Cavazza and the Knight was supposed to be someone who was "inspired" by the ACB character which is why he dressed the same. So they weren't the same characters, just people who looked and acted like them. Not sure what the deal with the Crusader is though.
I like the artwork for the Robber. If they keep him like this and less like the Footpad, I might actually end up liking him. The Footpad was by far my least favorite ACB character, for some reason I couldn't stand his stupid hairdo.