What has Far Cry got to do with AC? Do you mean from a technical POV considering the bad frame rates etc?
Both Ubisoft. Both sequels. Both look very similar to the previous game.
That said though, I'm hoping Far Cry 4 is just like 3 but with a different setting. Looks like they still have the outpost system, and the animations look the same. Should be a laugh though.
AC Unity is a joke. With the developers saying how they've virtually hit a performance wall with consoles, due to the amount of AI processing there is (with all the large crowds). Then you have the likes of GTA V, that ran on the measly last-gen consoles, with an impressive amount of pedestrians/traffic around.