Bedliner durability is relative to applicator and preparation. – But, for the sake of argument, a poly-hybrid in general exhibits better specs for adhesion, tear and impact resistance than polyurethane or aliphatic urethanes.
Applicator experience and prep is a huge factor in regards to longevity and perceived durability. Meaning that if the applicator is experienced enough, he can make a coating with lower specs than another last longer and in general than a better spec material applied by someone without the proper experience.
Take this into consideration when having a bed liner applied by a shop. If you are seasoned or have the support of the coatings manufacturer you may be able to produce the same if not better results than a professional company. Spray Lining and Coatings has the best support hands down for DIY systems. So, along with reasonable material prices, you get the information and support you need to finish your job with superior results.