Thanks for the responses!
I think what I’m really wrestling with, more than the two judgments, is that we are subject to time and God is not. My thought was that perhaps there is only one judgment, which manifests itself to our body/soul composites as the final judgment within the bounds of time (which is the only way our body/soul composites can experience reality - “a series of successive events”), AND manifests itself to our souls upon separation from our bodies as a particular judgment outside the bounds time (which is how God experiences reality, how things really are). In other words, the “result” of the final judgment affects the soul immediately (I hesitate to use “immediately” here since it implies time) upon separation from the body because the soul is no longer subject to time (assumption on my part) and therefore all creation, including the final judgment, is happening (…or something like that, difficult to express a reality without time).
Anyway, along with this all being based on conjecture on my part, the existence of Purgatory directly contradicts it. Since the particular judgment has three possible results (Heaven, Purgatory, Hell) and the final judgment only two (Heaven, Hell), the two judgments are not the same.
There’s also the belief in the new Heaven and new Earth after the final judgment (CCC 1042-1050) which pretty much destroys whatever grasp I thought I had on this.
…there was a practical reason I was thinking about this, but I’ve forgotten what it was…something to do with a chance we, the Catholic Church, have at getting all souls to heaven…