The first UOA was the factory fill (see thread here), and the second UOA was the "Advanced Moly" version of Zepro (see thread here).
Nb. that NAPA's contract lab continues to drop information that I filled in on the slip, including top-up oil added. The car drank more oil this time, about 1.5 quarts over the ~6k mile OCI. I acted on my earlier suspicions that this is related to an open TSB from Subaru (pertaining to a defective PCV valve that affects my car's VIN range which causes oil consumption) and replaced the PCV valve myself, as the dealer's response when I told them the issue was that they wouldn't act on the open TSB without running an oil consumption test, and that if the oil consumption test showed consumption above their threshold they might replace the short block too. I don't want the short block replaced, as I like how the car runs and the fuel economy I get, so I bit the bullet and bought the new-design OEM parts from the dealer's parts desk and did the work myself. If it still drinks oil next OCI I'll talk to them again about running the test. I suspect the increasing amounts of top-up oil are the reason the TBN has been going up from sample to sample.