So, I was playing in an empty world, using only wooden tools. It was sort of an experiment in how long I could go without using up non-renewable resources. Eventually, I fell in a hole, and decided to go further down, instead of trying to escape. I chanced upon a couple blocks of mese, but found I couldn't harvest them! Of course, this warranted investigation, so I switched to my creative mode world, which has been throughly trashed from all the other experimenting I've done there. Laying down one of every block, I found that only two blocks cannot be harvested by hand, by wooden pick, or, in the case of the cactus, the wooden axe. (This is ignoring the cloud blocks, which cannot be removed at all without exploiting a glitch in the saplings or using a plugin such as worldedit.)
These blocks were of course steel and mese. But heres the odd part. Mese makes a faster pick than steel does, but the steel block cannot be harvested by a stone pick, while mese can. Both can be harvested by the steel and mese picks. So which is it? Is mese harder than steel, or is steel harder than mese?
Note: this isn't really a "looking for an official answer" type of topic, I just want to hear other people's thoughts on the matter.