Not sure if this is a feature (for some reason?) or if it is a bug, and not sure if it applies to other types of stairs and blocks. Searched the forums and no one else has mentioned it, so I thought I would. Breaking the stairs takes about 30% longer or so than breaking a full block, both with fists. Just thought it was odd, and probably not something many people notice. (Just bought this game, and I am absolutely loving it btw)