Transhuman – noun –
A human being whose capabilities have been enhanced such that they now exceed normal human maxima in one or more important dimensions.
An incremental step in human evolution.
Posthuman – noun –
A being which has been so radically transformed by technology that it has gone beyond transhuman status and can no longer be considered human at all.
Any member of a species which succeeds humans, whether having originated from humanity or not.
The next major leap in human evolution.
Oxford English Dictionary, 2036 Edition