The thing about Paramo is that it is completely different from other systems. It even takes some real mind-bending to get the concept right, and that is why perhaps it is very misunderstood and not as popular outside the UK as other systems. Even the creator of the system, Nick Brown, has a hard time explaining the system.
Basically, it doesn't work with a membrane, at all. It works with two layers, one a "pump liner" which literally, mechanically, through the physical shape of the fibers, draws water away from the inside. It isn't a chemical process like hydrophilic and hydrophobic fibers, nor a process that relies on heat from your body the way Pertex/Pile systems do. The second layer is an outer microfiber shell that provides wind protection and, when washed in Nikwax Direct, keeps the shell's DWR rain-shedding ability. If you were to sit in a puddle wearing your Paramo pants you'd feel the water seep through, but stand up and within a few seconds that water will have been drawn away from the skin and you'd feel dry. You can put Paramo gear over wet clothing or skin or hair and it will draw moisture away, drying you off. It's amazing stuff.
I will always prefer Paramo over other systems, though until recently it was so heavy that it just wasn't worth it for lightweight trips, was bulky, and many people claimed it is too hot except in colder conditions. I think people tend to think in conventional terms when using it, though, and miss the variety of ways you can use it. You can wear it was a traditional outer rain layer, but the material is so soft and pliable that it feels very good against bare skin and can be worn just like that, alone. Sometimes I use the rain gear without my other layers, as a kind of waterproof shirt. In winter my Velez Adventure Pants are waterproof and warm, without the need for any other layer except insulation when sleeping.
Even when sweating really hard I have never felt wet with the Paramo on… just hot when the temperature was too high. If it is that warm I usually don't use any rain gear at all and just get wet… I can always use the Paramo later at a rest stop to dry myself off.
Think of it as a more of a kind of ever-drying "towel" than a rain shell.