whats the difference in an A

Just a point of clarification I noticed as I looked through the forum threads.
A2 (capital A) is the protein, a2 (small a) is the brand. You cannot refer to a2 the company as A2. The brand was granted to a2mc years ago on the basis that a2 used the small a not the capital A (even you Chanti!)
You will also notice that Pura uses the capital A when advertising on its label "naturally contains A2 protein"
The use of A2 by Pura is not an incorrect statement but it capitalizes on the lack of this knowledge to intentionally confuse and mislead the public into thinking that the A2 protein is the same as the a2 brand, and thus share in a2mc's brand and marketing efforts in an attempt to increase their own market share at a2mc's expense.