The top ones are more for mountaineering and the bottom ones are cheap and not very good I'd say. I've had the same as the bottom ones and after a few wears a few of the spikes/studs fell off. This is quite a few years ago when I was more steady on my feet. I definitely would not like to walk in those now. I'd feel safer with my un-invented invention, as I'd be walking on a grippy, rubber platform, not ice and you wouldn't have the hassle of keep having to take those shoe grips off every time you drove your car or walked on non icy surfaces. Maybe I've given too much away and someone reading this will one day be on Dragon's Den, with
MY idea!
By the way, my invention is based on short moves across ice, not for long journeys as that'd take so long. It's intended for icy patches such as the dangerous grassed area to car move I unsuccessfully attempted the other day, to get to my car across a very icy narrow road.