Reports on casualties and aircraft shootdowns are a bit of a mess.
All sources were essentially shadey videos that were posted by telegram accounts and then regurgitated elsewhere. Unlike a lot of aircraft downings I haven't seen one video or photograph of a crash site, and in particular no bodies or confirmations of pilot names. This is unusual because typically civilians are first on scene to crash sites and take pictures/video.
It's also notable that Prigozhin claims to have killed nobody, Wagner claims to have killed nobody, and the Russian state via Peskov (press secretary) also claimed no casualties.
If Putin were aiming to turn people against Wagner for this, the killing of Russian service men ought to be a very easy way to do so. We're kinda lacking explanations for why both Prigo and the Russian state are claiming none of these actually happened, that nothing on the convoy was shot despite videos of bombings claiming that's what the videos were of, and that the videos of attacks on aircraft were false too.
Weird scenario really. I wonder if Russia will concede these happened and walk back claims to the contrary later though, it does seem that a lot of the pro-russia accounts are not letting go of them as having actually happened, even people like Strelkov keep raising the deaths of the pilots as "tragedies". Will be interesting to see what's real and what isn't when the dust settles.