I just happened to order a new ball the other day since one of my friends who isn't a regular pool player found the measles ball distracting (as I did for about the first 3 minutes that I played with it when I got it). Then I happened to see this thread and wondered if I should be concerned over differences in play...
So I started doing a test of taking the same shot over and over again, chalking and switching CB's each shot. After about 5 minutes of that, it became clear that chalk marks were getting erased in the process because neither ball was accumulating a lot of marks even though after the first few shots I could see that chalk was sticking...
So then I decided to simplify- take 5 shots on each ball, straight left English and straight into a rail. You can see the results for yourself. Don't ask me what chalk or what tip, if you do, you're crazier than I am for even testing this ridiculous proposition. The level at which I struck the CB's was comfortably below the level of the point of the rail and with straight left spin, there was no chance for the felt to erase any marks.
5 shots on each, 5 marks each- on average, the same amount of chalk on each but my gas spectrophotometer is broken so I couldn't vaporize the chalk for precise measurements for you, OP. Sorry. But seriously- there is your photographic evidence that the same ball- one with measles, one without, hold the same amount of chalk. If you have a non-measles ball that doesn't hold the chalk like that then it is probably an inferior level aramith like "ideologist" mentioned. And fell free to use that ball, nothing wrong with it. Just be sure to note that there are non-measles balls that are of the EXACT SAME composition as the measles ball, and that composition is used in tournaments the world over before you knock the composition of the measles ball. I don't care either way other than prolonging my felt life. Gimme a bar ball and I'll still be able to play...
As soon as I can find the wife's little food scale, I will weigh the balls and report. Clearly they are different colors. I assumed they would be of the same material and according to descriptions, they should be. The bottom line is that both balls seem to play the same. According to what I read about aramith pro series when I first bought balls, their formula "burns" the felt less than their lower level formulas. The red circle is $1 less and not described as "as used in tournaments all over the county....," as both the measles ball and the SAPCB are so I assume that the red dot it is of a lesser quality to some degree- at least for burning the felt, if we are to believe the Aramith description- and I see no reason not to. I see that "ideologist" above says that the circle ball is garbage and to use the red logo ball... it didn't make the pic but the ball on the left is the red logo ball.
http://www.ozonebilliards.com/suarprocueba.html- here you can see the Aramith Pro CB that I bought and comparison to the red dot and the measles ball. I bought mine at Nielsen's, though.
So, OP- should I now worry that I got a counterfeit Aramith ball since it is clearly more yellow than the other ball? lol.