I think your tests are better/more thorough than my own for sure... Using qty 2 of each is one more each than most of us use 
. Maybe those V5 2A's are pretty good. Think I and djozz used V6 2C's. I truly believed the cooler tints in the same bin will perform better, but after djozz's light meter tests, I'm not so sure now. His test results indicate cheaper light meters (maybe Extech included) measure cooler tints higher than neutral and warm tints.
djozz's here: https://budgetlightforum.com/t/-/27500
Actually in looking over the results, they are actually pretty similar to yours. His lumens are higher but he's not using any reflector or glass, just bare emitter I think.