Well, for Chases,
Series 1 had 2 Fett chases and both were simple color variants on the arm-bands.
For Series 2, there was 1 simple Color Variant (Sandtrooper), 1 accessory variant (Cantina Band Dude), and 1 unique figure (Indy).
For Series 3, there was 1 simple "accessory" variant (vinyl cape Jawa) and TWO unique figures as chases - Carbonite Sickness Han and Logray.
That's the fun part about Kubricks - no one knows how many chases or what they will be until they are released! There could be 3 unique figures, or maybe only 1 chase - no guarantees!
And yes, by fun I mean "fun" right up until you realize you have to start chasing figures.