I think you can't take these events as good comparisons. The airforces were in no good conditions and the pilots on both sides lacked training. The Ethiopeans with their Su-27s were supported by the russians, including russian pilots flying missions.
Most, perhaps all Eritean MiG29s were lost in close-in dogfights using R-73. Several R-27 were fired, but with hardly any succes. As far as I know, both sides fired them from max range, what made it relatively easy for the other side to evade them.
Not that badly trained as one would suppose. One of the kills was by an african woman pilot flying the Su-27 was ironically against her own Russian instructor on the MiG-29 on the other side of the fence.