Taking into consideration all the steps used in homebrewing, I don't see the need to spend "sterile" filter money unless you are trying to get away with not baking.
After all, it is a FILTER. It keeps contaminates on one side, not letting them through to the other. Whatever may be on a non sterile filter bacteria wise, and I would wager to say it is nill, would be taken care of in the baking process.
Save some dollars with non-sterile filters.