Since it allows for increased performance intra workout, PAP is a fantastic tool that can allow more volume to accumulate, ultimately leading to more adaptation and subsequently strength.
BFR is primarily used in a clinical rehab setting while working to maintain strength and size of an injured limb. Without occlusion these low loads simply do not provide enough stimulus to yield any meaningful adaptation from the muscle. In training, BFR implementation can spur muscle growth, increase strength, while handling less total volume and intensity.