I do remember opening a thread about this Tempest last year when it was first introduced and a mockup was unveiled and they did mention that one of the plans was for it to be able to function as a manned or unmanned aircraft and I remember thinking that would be quite the feature, especially if it was interchangeable within a single airframe and not just separate, dedicated ones. In other words, if they built it and it was operating in a battlefield environment and the pilot returned from mission and command decides that the next mission is too dangerous and only an unmanned version should be used, then they had the ability to change it into that within say 45 minutes tops, and send it on its way....now that would be impressive!
But having two different platforms would be like just having a UAV version on top of a fighter. Not so impressive IMO.