Whirlpool / KitchenAid Quarter-Turn Base Grille Filter Comparison

The Deluxe (4396508) and Ultimate (4396510) are interchangeable, so you can use either filter in your fridge.

As you can see from the chart, the Ultimate filter removes more contaminants from your water.

For example, the Ultimate filter removes 99.99% of all cysts from your water, while the Deluxe filter removes none.

Contaminant Deluxe
4396508
Ultimate
4396510
Cysts --- 99.99%
Atrazine --- 85.6%
2,4-D --- 93.06%
Asbestos --- 99.93%
Turbidity --- 99.3%
Particulates 95.1% 99.9%
Chlorine 99.0% 97.6%
Lead at pH 6.5 99.35% 99.35%
Lead at pH 8.5 99.31% 99.31%
Mercury at pH 6.5 96.22% 96.7%
Mercury at pH 8.5 91.57% 91.2%
Benzene 96.4% 96.3%
P-Dichlorobenzene 99.77% 99.7%
Toxaphene 92.86% 92.96%

Both filters leave beneficial Fluoride in the water