I’m not sure which package came first ( I believe it was the one on the left ) but a few years ago Aramith sold this ball separately, then took it off the market and began to sell it ONLY with a set of TV balls; recently Aramith began to market the ball separately again. I believe this explains the two types of packaging.
I think the procup is 6oz and the red circle is 5.5
The procup is also bogger than most balls which is normal when mixing old balls with a new one. Think of replaced 8 balls
Red circle is easier to draw but if you have stroke, you will be fine.
BTW - I think there is some fakes out there. My pool hall has two different pro cups. Some that yellow like regular arimiths and others that stay real white but they crack under the surface. Some are full of cracks.