Alpha vs Beta Stability

I don't know if this has been asked/answered on this forum. I was wondering the difference between alpha and beta concerning engine stability. The alpha for my setup ran flawlessly but are they still tweaking for better performance? If you respond to this I would love some statistics rather than a "yes or no". Thank you

That question is answered in the timeline PDF.
I'll edit in the link when I find it.

what kind of "statistics" do you expect? how do you even make statistics on information that isn't even released yet.
all we know is they are still improving it, by how much we will see at the end of beta.