Name that Pom

I ordered scions from ucdavis around a decade ago. I lost track of what was what and 1 survived. Of the 6 possibilities does anyone have any input as to which pom of the 6 this could be? I am in zone 10A and the photos were taken last weekend September 2021. It definitely had a tart flavor.

6 possibilities are:

  1. Parfianka
  2. Al Sirin Nar
  3. King
  4. Syunt
  5. Kazake
  6. Sirenevyi