I have a long dedication to the "FBI Load" and have no reason to question the information provided in this thread. I will say that taking a limited sample of ANY load is bound to produce numbers that are not true when compared to a larger sample. That's nothing more than sampling error.
I'm not certain that any of this information changes much. I've used every factory loading of the "FBI Load" over the years but the Remington load is by far the most common and easiest/cheapest to acquire; therefore the load I've shot the most.
I've always operated under the theory that bullet expansion is just the icing on the cake. If the bullet expands, great. If the bullet doesn't expand but penetrates adequately, I can live with that.
Over many years, decades actually, the basic FBI load has proven to be a reliable self-defense load when fired from short barrels. It is that short barrel performance that makes the FBI load shine. The Remington version may be slightly better when fired from a 2" barrel but only a large sample tested against an equally large sample of another load will tell the tale.