To clarify:At the time the plan was to replace the 40 ton payload standard Il-76 with the 47 ton payload An-70..
The first modifications of the IL-76 had a take-off weight of 170 tons, a payload of 28 tons and a range with a maximum load of 4,200 km. In the course of modernization, the take-off weight increased to 190 tons, carrying capacity up to 43 tons, and the range with this load reached 4,000 km. ..
Characteristics of the IL-76 allowed to work on the establishment of aviation world records. In July 1975, the crew of the Honored Test Pilot of the USSR Hero of the Soviet Union Ya.I. Bernikov in the flight with a weight of 70 121 kg reached an altitude of 11 875 m. On a closed route, M. Tyuryumin showed a record average flight speed of 857.657 km / h with a load of 70 tons at a range of 1,000 km and with a load of 70 t at a distance of 2,000 km reached a record average speed of 856.697 km / h A few days later, the crew of A. M. Tyuryumin in flight with a load of 40 tons on a closed route of 5,000 km reached a record average flight speed of 815,968 km / h.
..the IL-76M version virtually resembles the IL-76 basic aircraft, but has a maximum payload of 47t, compared to 28t for the IL-76.
The Il-76MD is an Improved military transport version, (modifitseerovannyy Dahl'ny – modified, long-range).
The ADS installed onboard the IL-76MD-90A facilitates dropping of parachutists from an altitude of 8,000m at 220km/h to 400km/h speeds
Russia decided to use IL-76s for those missions, so absence of the AN-70 didn't compromise anything, at least for now, IMO.