I bought a pair each of regular fit, straight leg, zipper fly Levi's, Lee, and Wrangler jeans. The Levi's(505) were $40, the Lee's $32, and the Wrangler's $20. I washed all of them once, in cold water. They all fit about the same. The construction seems to be about the same too. All had 5 belt loops and reinforced the same points. They all were about the same weight denin. One difference I could find was that the Levi's had two rivets on the coin pocket while the Lee's and Wranglers had one rivet there and sewed the other side of the coin pocket into the main pocket seam. Also, the Levi's print your jean size on the outside label, while the Lee's and Wranglers do not. Both the Levi's and Lee have a double stitched external inseam on the inside of the legs and a concealed inseam on the outside of the legs. The Wranglers reversed this with the concealed inseam on the inside and a double stitched seam on the outside. The length of the inseam, compared to the advertised length, was pretty close, with the Lee's being the longest, and the Wranglers the shortest.
Overall, I would say they all three pairs look like they will be fine over the longer term. So perhaps the price difference and your preference for brands might be the deciding factor.