They have good and bad points I think. For a start a wider ski will have a higher swing weight then the same ski in a narower width. This will mean spins on and off and switch ups will require more effort and will require you to throw harder. On the actual rail it depends how you like to slide. If you generally like to slide with a flat base you should be ok, but if you like to angle for example your front foot it can feel weird, its a bit like a wider ski being slower edge to edge. Surface swaps may be slightly easier as you have a greatet surface area. So if you like to spin on and off and switch up alot then probably go narower.