Plastic Bonsai,
Regret tardy reply, rather busy recently.
Difficult to be specific since my recall of detail some 32 years previous is scant. Apart from the Radome change to the GR Tornado shape, the RAE operated Buccardo, XT272, was totally clean, with all the Tornado test installations removed, so very lightweight.
Handling wise, it was smoother and more stable than a similarly clean standard aircraft and very quick off the blocks. None of the conventional Buccaneer buffet, L&D vagaries etc at slow speed and in landing configurations.
A previous PPrune Topic on procuring new aircraft, which I note you contributed to, included some discussion of the Buccardo, which included comments that the platform performance with the Tornado 'avionics/weapons boxes' fitted was 'embarrassingly good'.
lm