(Btw, I don't know much about this, but one difference about rices is their starch structures. Different starches hydrolyze to various extents when you cook them, which seems to me to at least matter calorically (the amounts of washed out saccharides will not be the same). I mention this since it's already a "continue this thread", so less likely to distract people.)
Basically: How does one pursue the truth when direct engagement with evidence is infeasible?
I came to this question while discussing GMO labeling. In this case I am obviously not in a position to experiment for myself, but furthermore: I do not have the time to build up the bank of background understanding to engage vigorously with the study results themselves. I can look at them with a decent secondary education's understanding of experimental method, genetics, and biology, but that is the extent of it.
In this situation I usually find myself reduced to weighing the proclamations of authorities: