Simple:

Our new low profile, hard panel tri-fold offers easy access from both front and rear. The EnCore cover is self-positioning for pain free installation and self-latching for extra security. Engineered rear latch locks the cover at the tailgate. Wide opening front panel provides access to front half of bed and can be locked using your ignition key featuring BOLT®, one-key lock technology

Superior:

Extang engineered 1-inch thick panels are FRP (fiberglass reinforced plastic) for superior UV protection and thermal stability. Textured powder coated frame and rubber corners are ExtangTuff to resist dents and scratches. EnCore’s ALL NEW flexible hinge system is ultra-strong, water resistant and provides superior performance!