Thanks for that John, but wasnt the fact the Harrier could VIFF one of the reasons it was so good at low level combat. So the JSF has lost this ability, and would lose a dogfight with the Harrier.
Or have I got the wrong end of the stick, and although the JSF has vertical capabilities it is not a Harrier replacement, but a Jack of all Trades, and hopefully a master of some ot them.