[quotewhat stops another company from slapping the same name on a ball and have it be different?[/quote]
For one, the RG and differential could be measured on a randomly chosen ball (i.e., not one provided by the manufacturer). If Lane 1 were to submit one ball for approval but put a different core in the mass-produced version without telling anyone, a spot check would bear that out.
Further, someone could cut the ball open and discover that the core is or is not as advertised. Admittedly, with a Lane 1 ball, it'd be an expensive proposition, but it could be done nonetheless.
And I think that any company dishonest enough to do something like that wouldn't be in business for a long time. It'd be nothing for the USBS to deny any new balls that they submitted. That'd kill their business pretty effectively.
SH