Filtering media is supposedly the same. PureOne has silicone rubber bits while the Bosch has the 'regular' stuff. No grippy paint on the Bosch, either.
Best information tested and posted here (see links below) says with the exception of the can, they are identical. Based on that, and same efficiency rating, it is my belief too.
Originally Posted By: sayjac
Best information tested and posted here (see links below) says with the exception of the can, they are identical. Based on that, and same efficiency rating, it is my belief too.