I think there is an inherent demand to put everything in numbers. Which camera is better? For most people this is the same question as "Which one has more megapixels?".
A summary like this one is very helpful for new users, but it should not give a false sense of security, which too much "numbers" and "ratings" may do.
It's ok to list things like "uses own chips" etc, but after all it boils down to one question: "Safe to buy from this vendor?". Which would be "Yes" for companies that deliver on time (even when they offer preorders) or "No" for companies which do not deliver on time, do not honor refund requests etc...
Of course you put much work in this, but maybe you consider this for the next version of your guide.
+1
You can boil this down to a personal recommendation.
I think there are only 4 to 5 companies that have produced and delivered in a reasonable time frame most are Chinese and one is Israeli. All others have had issues and would warrant NOT doing business with them. Agree that these 'numbers' could be misleading and agree with pure deliver nature and potential compensation of slightly off target or late delivery as the real value of measuring any company providing miners.
For me I would only recommend those without customer issues or issues that were completely RESOLVED. Unfortunately this guide doesn't take seriously enough the threats to customers posed by any number of complaint threads. One can just as easily save yourself the hassle by avoiding any company with a checkered past with regards to shipping or customer service failure which remain unresolved. No need to risk your coins on anything that even has the HINT of shady venture given the other companies are shipping at a reasonable clip.