yeeeeuh, same gears just different mechanicals at the hub/cog level.

gasian, anything is "skid-possible" if you're strong enough and throw your weight around properly. it takes practice and is easier to learn how to do it with a lil baby gear and move up. i could probably skid a 39/19 with my shin while sitting, for example. 52/15 is pretty tall for street riding in general though, but hey if you have the balls go for it. i dont.