I haven't tried or seen a Natural yet, but I assume the Natural should be able to be used for a subset of the conditions for which I and many others use the B/G Centaur.
While the Natural has a more average core and higher differential (kind of needed for the urethane shell to perform on today's conditions) than the Centaur, I do believe the BGC has a much wider range of performance options mainly due to the extreme versatility of the coverstock.
I've used it anywhere from 2000 Abralon (1000 grit US), the stock surface, to as high as 4000 Abralon with a strong coat of polish. While technically, the Natural's coverstock can probably be adjusted in a similar manner, most people would not do that due to the extreme difficulty required to adjust the urethane coverstock. Even if you did that, you still wouldn't get the range of options that the BGC's coverstock gives you.
While Britton may be stretching it a bit, I assume a few higher rev people could use the BGC for medium oil, that is not its strength nor what it was designed for. It is a medium-light to light oil ball meant for control.
From a design standpoint, with their stock surfaces and similar drillings, both balls would probably be very good for similar uses. The resin BGC might be more susceptible to delivery changes, going from bowler to bowler. For me, it has been as close in concept to a urethane reaction than any other ball I have thrown, especially with matte finishes.
--------------------
"None are so blind as those who will not see."
Edited on 7/14/2009 10:26 AM