[Graham Boak]

if you look at the upper example of the two colour photos, you'll see that the red of the fin flash and the fuselage roundel appears much more orange than the red of the spinner. I think this is sufficient to explain why the aircraft was thought to have been the the SAAF.

I have seen it said that the aircraft were to some extent inter-operated by the two units, and given the high loss rates this is plausible. However it may simply be based on misunderstandings such as the above.