I've done some data logging during a level drive at about 2k RPM of my O2 sensor readouts: trim and voltage. I'm new to the Mini and new to gas engines (been working on diesels so far). Does this look abnormal? Seems like the voltage on the post-cat O2 sensor follows the voltage of the pre-cat too closely like the cat could be bad but I don't want to jump to conclusions.

 

Your conclusions are pretty good, prob. w/ the 2096 & 2097 are could be CAT could be sensor, although the voltages are still within range (suggesting sensors are ok) if you have the ability you may want to swap the sensors around & see if it changes anything, even though it will take some time, will reconfirm your suspicions before you spend your $.