Is my G12 sensor cleaner than the G15 sensor?

Just wondering if I should keep my G12 and not trade up to the G15. I mainly use the camera for macro and only shoot at iso 80 for the cleaner image and was wondering if the new cmos sensor in the G15 would be any cleaner at iso 80. Thanks for any input.

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Brad
Windsor.Ontario.Canada
WSSA member#52
PBase Supporter
www.pbase.com/bradsandy