I agree, there should be a standardized measurement system for things such as hook rating, backend hook, etc. At present (as Mumzie pointed out), the closest head to head comparison you can find is Bowling This Month. There needs to be some type of industry standard where every company has to use the same scales, so that the ball purchaser knows what he/she is getting into.
What really muddies up the picture here too is the difference between scuffed and polished balls. There needs to be a standard scuffed value to compare, as well as a standard polished value to compare for each ball....this way, the purchaser has a clue what they might get from a particular ball versus another ball.
At the present, there is absolutely NO standard, except for what can be derived from BTM.