Structure
Usually a rigid molded construction, although exact behavior depends on the formulation and product design.
Generally softer and more flexible than rigid resin or metal designs.
Generally rigid, with final characteristics depending on alloy, shape and construction.
Weight
Often considered when lower finished-product weight is an important buying priority.
Weight varies with thickness, density and the amount of material used.
Can feel more substantial, but actual finished weight varies significantly by design.
Flexibility
Normally designed to hold a defined molded shape rather than flex substantially.
Flexibility is one of the main characteristics buyers may notice.
Normally selected for a rigid structure rather than material flexibility.
Surface
Molding quality, finishing, edges and seams should all be inspected.
Surface feel depends on formulation, texture, finish and product quality.
Surface finish, edges, joints and manufacturing quality deserve close inspection.
Maintenance
Accessible removable components may make routine inspection and cleaning easier.
Flexible surfaces and openings still need careful cleaning and complete drying.
Smooth areas may clean easily, while joints, locks and enclosed areas still require attention.
Buying Priority
A rigid non-metallic route that can work well with compact, lightweight-oriented designs.
A material route to compare when flexibility is one of the main priorities.
A route to compare when a rigid metallic construction is specifically preferred.