In that case f35 is strike fighter, so not geometrically slimmer. AMCA in between f35 and f22 with less fire power and that is not a issue thanks to cats.AMCA is not a dedicated air superiority fighter. It is a multirole fighter like F-35. But its makers wants to make it as simillar to F-22 and not F-35. AMCA is geometrically slimmer. That's why the difference I think.