I use a combo of both. the nubs last longer, but the spikes grip better .
"Hey, buddy, can you come here and shoot out the left side for me? My remote line doesn't let me...."
Look at your comment. Back to mine. Back to yours NOW BACK TO MINE. Sadly, it isn't mine. But if you stopped trolling and started posting legitimate crap it could LOOK like mine. Look down, back up, where are you? You're scrolling through the comments, finding the ones that your comment could look like. Back at mine, what is it? It's a highly effective counter-troll. Look again, MY COMMENT IS NOW DIAMONDS.