AMX vs Harrier for usefulness in a carrier

In another thread, me and some other chaps were discussing possible A-4 replacements for the Brazilian Sao Paulo.

These included

maintaining the A-4,
navalizing the AMX
or
acquiring surplus harriers (Sea or Gr.4?)

the latter sounded interesting but does it offer enough capabilities over the AMX? I would assume it does over the A-4 at least.