A warning about any "ventilator" shoe- not only do they let in air to cool feet, if worn on a very dusty trail the fine silt that also comes in makes your socks like sandpaper. This happened to me this weekend; ended up with blisters on the bottom of my toes.

Steel toes in boots will also cause frostbite if temperatures drop below freezing. When I had to wear hard toe shoes in Wyoming in below 0-degree F. we used shoes that had plastic (maybe fiberglass?) hard toes.

If you are just walking on icy snow, there are crampons made for flexible shoes. The only reason you would need a stiff shank in a climbing boot is for hard-core ice climbing.