vakakaaa "According to the bulletin of the Tupolev Design Bureau, during the modernization of the Polish Tu-154 to version Tu-154M, the RSBN system was dismantled...
...but the Yak-40 has RSBN-7C". Therefore 36SPLT Yak-40 pilot, Lt. Arthur Wosztyl probably could tell whether he had an opportunity to try to use RSBN or not during the approach (ref: sukhoi.ru)."
vakakaaa, aerodrome things for RSBN usage were located on the other side of the runway. They say they were dismantled when the military moved out last July. RSBN (they say) was appliccable when a plane enters the runway from the opposite direction, from the West. This one was East, as I understood. So the plane arriving from the West had to turn around and all.
My understanding is the same as yours - Yak was better equipped - and is better equipped for military Russian aerodromes still - but in that particular case it made no difference.