Well, we know Charlest doesn't make much sense.
Lane1Bowler said that the same ball with different RG's are going to react differently. I'm not sure how he contradicted himself.... He was just refuting what you said, which is in effect the RG doesn't matter in a ball. 99% of bowlers will clearly tell you it does.
I know what're trying to say. You're saying that just because a company doesn't have an ultra low RG ball doesn't mean they can't get the same reaction as another company that does, as they can make this up in coverstocks. This is true and false I believe.
The core determines how the coverstock is going to meat the lane. It's the engine that turns the ball around. So although you could put a stringer coverstock on a higher RG and get a similar effect as a low RG with a weaker coverstock, you'll run into problems.
The coverstock works as a function of revolutions and friction. The core doesn't.
So, to get the same hook with a stronger coverstock, you're going to lose mroe energy. Friction is what moves the ball as the coverstock comes into contact with the lane surface. It should follow that the ball loses velocity and thus momentum (power) symmetrically with how much friction it generates.
A very low RG ball will rotate faster and more with the same amount of force applied to it as a high RG ball. Once agin, consult your physics book. The ball will rotate forever in a vacuum. The only thing slowing it down is the surface of the ball coming into contact with the lane.
So a low RG ball with a weaker coverstock will slide more on less oil and make a bigger move in the backend. A more heavy duty coverstock on a higher RG core will make a move earlier. But it pays for this by losing power.
The idea is to get as much hook as needed to create an ideal angle and retain as much energy in the ball as possible at pin contact.
This is why I prefer peralized balls with a lower RG's. I want a ball from Brunswick, as I like their stuff, that an RG bordering on the lower limits so I don't have to use as strong a coverstock. In theory this ball will slide longer and produce a more skid/snap reaction. It should also, in theory have more power left for the pins.
I guess that's what I'm looking for. I want to be able to drill them to skid, then rev hard and peak as they hit the breakpoint. This saves more energy to make the backend move and to hit the pins with.