IMHO, 501's dress DOWN your outfit. It's something about the washes, the cut, the red tab and the back pocket detailing. With Double monks you want to dress UP your jeans. Minimal detailing with a slim cut. The first photo, which looks totally amazing, illustates the point exactly. I don't know what jeans that the dude in the photo is wearing but I highlly doubt that they are 501's. +1....510's hardly EVER dress up an outfit.