Which is correct: the initial contract, #73/90422, granted to AMD/BA on December 5, 1973 was for a generic "ACF"; an amendment (n°1) to the said contract, dated July 9, 1974 specified that the aircraft designation was "Mirage G8A 01"; this was changed by a further amendment (n°4) on August 1, 1975, to Super Mirage.
ACF / Mirage G8A /Super Mirage was to have two rather different variants: a single-seat interceptor; and a two-seat nuclear strike aircraft to succeed to the Mirage IVA, carrying ASMP. The interceptor had two different missions profiles: high-altitude high speed interception, with only two Super-530 (TOW 21220 kg, climb to M2,2 and 60kft in 5,8 minutes, M2,2 flight for 4 minutes and interception at 400km from base); air patrol, with 2 Super-530, 2 R-550, 23060kg TOW, climb to 50kft, 1,2 hour patrol, acceleration to M2,2, 3 minutes combat. The nuclear strike version (prototype n°2 put on order by amendment #4) had a longer fuselage ( by 0,275m), simplified VG intakes (the interceptor variant had the "expending mouse" intakes that were very successfully tested on G8-02), no specific materials in the areas most subject to kinetic heating (which the interceptor variant had). With one ASMP, two tanks, two R-550 and full internal fuel, TOW was 28040kg, Lo-Lo radius 845km at 100m altitude and 1000km/h (Hi-Lo radius 1200km). Nav/attack systems were very different: optronic seeker and air-to-air radar for the interceptor, TFR for the nuclear strike variant.
This confirms what I suspected - one single type doing both interception and low-level penetration using 1970's technology was not possible.
The Mirage 2000C interceptors have RDI radar, while the Mirage 2000N nuclear strike bombers have Antelope V terrain-following radar.