Well, whats better? Tell why, too. They both have a same thing. Which is keeping your balance. Ice skating is on ice. And roller skating is on ground. Maybe roller skating?
roller blading,you can play roller blading anywhere,and sometimes it even helps you get to places faster(thats why i never learnt to use the bike,valid reason right?),but you can only skate in a skating rink,anyway,i've got a very sensitive nose...