Hey all.  I had a freind ask me about ball specs the other day and he caught me off guard with the questions he asked.  Two questions I didn't quite know how to answer was this.  

1.  "If I am looking for a mid performance ball that I want medium to high length with a smooth transition what kind of specs do I look for?"  I told him to look at the Diff #, the higher the number possibly the higher hook potential? Also look at the Rg #'s.  The closer the number to 2.6 the later it's going to rev up, the closer to 2.4 the earlier it's going to rev up.

2. "If I am looking for particular motion do I pay more attention to the spec numbers or do I look at core design and surface makeup?"  I wasn't sure how to answer this so I told him I didn't know.  What do you guys look at?  

I don't really understand all these cores and such.  Is there any kind of link you guys can give me to throw me an understanding of this stuff?  Do Brunswick and Storm go about designing cores differently based on their reputation?  Does Brunswick design a core to be more 'rolly' where Storm may design a core to go longer with a bigger backend?  I guess what I am trying to ask is do manufacturers have a niche they always design around?  Example: Honda cars are known for their great gas mileage and the longevity of their vehicles, that's what makes them Honda.  On the other hand Ford models their cars for driver convenience and more of an entertainment feature, hence they Sync system they developed.  These are 2 great vehicle companies with 2 different reputations depending on what you want out of your car.

I love physics and I want to learn more about the cores and what goes into producing them along with the design but I don't know where to start.  Can you help me out so I can better explain this stuff if I'm asked again?