The roof is extra but i would pay it and the second one looks more sturdy and heavier. I would put a roof on it though dont worry. And i would put a kennel in there too.
This is what they say about the last one......
"All Steel, 8 gauge, 2" x 4" wire mesh construction. Full-swinging, dog-proof, lockable latch door opens inward and outward. One inch extended base legs elevate the kennel walls off the ground for easy cleaning to prevent bacteria build-up. Wire mesh is welded directly into the steel frame, then galvanized to prevent rust. No sharp or jagged edges. Easy assembly, clamp together design assembles in 15 minutes.
6'H x 5'W x 10L
Kennel and cover sold seperately."