Information is subjective. You know things that I don't. This is, after all, why communication is useful. Strictly speaking, yes. However, in physical situations the difference of entropy as perceived by two observers may be negligibly small.
Information is measured in bits.
More bits means more information. However, in physical situations there is lots of information that is not known. Joules per degree Kelvin. Wait a minute. Entropy is physical and information is mathematical.