as far as strength...  the Immortal should out hook the red zone by far.  but I have no experience with a core with that high of a differential.  it seems to me that the higher the differential the harder it is to control on the backend.  so if your looking for a house shot ball, then the immortal would probably be fine.   but if your looking for a more well rounded ball, I'd probably stick with the red zone.  This is all purely my view on it.  I have not thrown either ball,  but I have seen an immortal pearl thrown and a red zone thrown and the immortal pearl was stronger than the red zone.  don't know the layouts so, I can't be 100% sure on my info.  hope you choose well and score well

Jeremy
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"Strive to be perfect,  that is afterall the only way to become perfect."

"If you compare yourself with others,
you may become vain and bitter;
for always there will be greater and lesser persons than yourself.
Enjoy your achievements as well as your plans."

Taken from Desiderata

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