They were Champion Labs products something like 15 years ago. Purolator makes Bosch filters for the US market and have for a while now. Not sure about the rest of the world.
Workshop = old Purolator Classic, probably new no-name Purolator
Premium = media of silicone ADBV of Purolator PureOne, but rubber O ring and no grip paint
Long Life = old Purolator Synthetic, probably NOT the Purolator Boss
DistancePlus = its own product
So you MIGHT run into media issues with the Workshop and Premium because there hasn't been much evidence that Purolator has fixed the tearing problems yet. The Long Life and DistancePlus are solid products, though.