the formidable is comparable to the aegis... .. it even exceed
the aegis in capability in some areas... like mass missile
guidance, stealth, sonar, cost efficiency and automation.
the aegis have the advantage of land attack with tomahawk...
something that RSN might get if we get the storm shadow for the
formidable.
in terms of long range SAM... the SM-2 is only slightly longer
range (~10km) then an ASTER 30.. but ASTER 30 have active radar...
while SM-2 dont.
in terms close range anti-missile defence.. the aster15 beats the
SM-2 easily..