Product review (5 stars): Found the specs, very very similar to original GE filter
I wanted to know the specs on the aquafresh supco filter compared to the GE model.  Both filters use the same carbon block technology.

Comparing the two specs, out of the 8 categories I could compare, aquafresh was less than <1% better in asbestos, mercury, and carbofuran.  Aquafresh and ge tied on lead and lindane.  GE was less than 1% better in atrazine, benzine, and chlorine.

Supco's NSF certification is pending according to their site listed below.

Here are the contaminant percentages for the aquafresh:
99.78% of 1,4 dichlorobenzene
98.32% of 2, 4-D
99.34% of Alachlor
99.3% of Lead
99.92% of Asbestos
99% of Lindane
94.22% of Atrazine
94.7% of Mercury
96.51% of Benzene
99.10% of Turbidity
98.78% of Carbofuran
97.60% of Particulates
97% of chlorine
99.99% of cysts

Here are the reference sites that were valid on 10/1/2013:
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For my money, I'll save the cash and go with the aquafresh replacement.