Totally different roles! The EF has been developed over about 20 years, it seems, and was optimised for supersonic agility and air dominance. Whereas the X-35 will be a stealth V/STOL fighter-bomber optimised for a mud-moving role (mainly) but with excellent air-to-air capabilities. The US will be getting the F-22 which will be used for the same sort of missions as the EF - only rather more capably (and expensively!).
Last manned fighter aircraft? Don't know about that - some ar$e called Duncan Sandys killed off the UK fighter aircraft industry with just such nonsense back in 1957.
[ 26 October 2001: Message edited by: BEagle ]