You have multiple graphs where the difference is a few percentages and then one which increases three times - obviously this is a large red flag. If enabling Resizable BAR triggers something in the driver which makes it work correctly and FPS to be more stable, this doesn't mean that Resizable BAR improves the minimum FPS three times. First you wait for AMD to fix the drivers so they work properly, and then test again. If AMD can't fix the drivers, then your theory is obviously correct and resizable BAR can also fix game bugs.
Also, you don't just publish min FPS results for the obvious outlier, as this will raise questions (everyone that has ever done benchmarking will be skeptical of the results ...). You publish frametime graphs, which explain in detail what changed when Resizable BAR got turned on. Isn't it obvious? It doesn't seem to be for them ...
Min FPS is the result of bottlenecking, SAM removes the bottleneck and you get more of the performance you are already receiving (the average FPS)
This isn't complicated.