Different sources, drastically different figures of KIA and MIA. I'd say that conservative assumption should take 500K as total losses in KIA and MIA, from Russian and Ukrainian sides as a whole. To numbers from the AFU's General Stuff I struggle to assign more credibility than to those from Konashenkov and other Russian propaganda loudspeakers on the other bank. The most reliable lower boundary could probably be found here. https://en.zona.media/article/2022/05/11/casualties_eng

This outlet employs what seems to me the most robust and conservative OSINT method, though, of course, the true death toll is undoubtedly higher, because a big number of corpses remains unidentified or broken down through the work of elements.

Notwithstanding the true scale of Russian losses, the damage for Ukraine is grossly more serious than these. From the demographer’s point of view, Ukraine is wounded near to death (in fact, worst case scenario of the Triple Alliance war is being reenacted), despite not passing away instantly, and its further prospects are quite murky. Of course, Zelensky and Putin have little to nil oppressive sorrows about this.