Unless you have a ball scanner, You'll never know what surface actually came on a ball from the factory or what surface you actually have on it after sanding & polishing it yourself.
The main thing is don't worry about trying to match the factory surface (unless you have scanner and can keep adjusting it until it match's up).
Try to match the reaction, By using whatever steps (regardless of what they are), that gives you a surface that gives you the reaction you want.
