I just wanted to proove my statement that ER is the same as 120 in Lo. By my experience, of course
Fired/killed
Р-77 13/4
Р-27ЭТ 9/4
Р-27Т 2/2
Р-27ЭР 4/1
AIM-120C 6/1
Р-73 3/1
I was shot down by
Р-73 3
Р-27ЭМ 1
cannon 1
I fired my ET only after the LA , but it got rather often too close to hit enemy by this mighty missile. In this very case you can see that T is more effective. As for 120/ER you can see that their figures're very close.