I would imagine it's pretty close. The medical stuff might be a little more pure, but that's probably the only difference. I get my oxygen and acetylene from AGA,{now Linde gas} the same source that supplies Union Hospital, where my wife is an O.B. nurse. Hey, we all got stuff to learn about. I sure the heck am no know-it all.
Turn your O2 bottle upside down; better yet, ask your gas supplier why you shouldn't.