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% |
| $34.99 each | $37.99 each |
Both filters leave beneficial Fluoride in the water
