it will be great challenge, the result would do good for consumer, however it is a product comparison, don't take it personally no matter what is the result.

Result is cruel, reading is cruel, the losing 1 doesn't mean it is a bad product.
As long as the reading is above recommendation then it is fine.

and have to understand each individual has own believe and preferences.

would like to clarfiy, the filtered water can drink directly for this model?