Depends if the MOD figures included DNR/LPR/Chechens/Wagner/Other PMC’s/Convicts or just regular RUAF personnelThis was February:
"U.K. Ministry of Defense said approximately 40,000 to 60,000 Russians had likely been killed in the war. A leaked assessment from the U.S. Defense Intelligence Agency put the number of Russians killed in action in the first year of the war at 35,000 to 43,000."
By all accounts Wagner lost about 20,000 men in Ukraine.
I suppose in proportion to their numbers the claim that non-Russian Army fighters have taken the brunt of casualties holds water in that respect.
I really don’t know - but if I had to commit I’d say non-regular forces fighting on behalf of Russia have taken the brunt of the casualties thus far.
Now there is a situation whereby PMC’s are now integrated into regular RuAF. DNR/LPR forces are mostly combat ineffective, they’ve run out of convicts and the Chechens keep running away so anyone doing the fighting and dying now will be regular RuAF.
What the actual human numbers are I couldn’t say. I don’t really believe any figure I see now. Vehicle losses are a different matter as they can be imaged, geo-located and recorded.