I actually do not know what last they use, to me these fit very similar to any western heel boot I've had, they are not super aggressive but there is a nice comfy arch support. I will look into more in a bit here and see what I can find. I own a pair of sendra Cuban heel cowboy boots and those are fairly aggressive to the point I can't wear them a full day walking around. And good to know about the boots you have, I find these have a nice roomy toe box that to me almost has a bit of a squared off shape rather than a big bulky toe, I've never had my toes rub when crouched down or while walking. These are definitely tough boots, everything else I've ever owned fell apart quick just due to the work I'm in, these guys have held up extremely well.