High internal bond strength PB holds screws better. Edge screws have half the strength of face screws. Staples are used for attaching fabric, etc., and to hold glued joints. Ring shank nails hold better, plastic coated best. Drive them at an angle.
Screw joints are comparable.
Plastic corner block units can be much stronger in outward bending, but only comparably strong in inward. Even when they are equally strong, mechanically-based joints are often less rigid. All the above are free. Includes information on material handling and storage, sanding, machining and tooling, laminating, wet finishing, edge treatments, assembly and fastening, construction products, shelving and formaldehyde.