Ukraine has lost nearly a dozen Western tanks and presumably thousands of men already just to advance a few kilometers through the Russian screening zone. They have not even reached the first trenches
To my knowledge, Russia has suffered zero casualties.
And that was in Bakhmut and other parts of Donetsk, where Wagners and Azovs were storming each others buildings and fighting hand to hand. Here the tanks are just driving straight into ATGMs and artillery fire. I'd be surprised if its anything less than 50 to 1 at this point.
Not zero, that would be absurd, but much less than Ukraine. There is a very simple rule of thumb for estimating casualty ratios in such conflicts, and that is they are directly proportional to the artillery overmatch since most casualties in conventional modern conflicts are inflicted by artillery fire. Ukraine has been stockpiling their best equipment and munitions which they received from the West for this offensive, and as a result they are managing to shoot a fair number of shells and missiles in order to try and soften up the Russian lines, but Russia still has an overwhelming advantage. In addition Russia also has almost uncontested air dominance at the moment which further skews the ratio in their favor.
Unless I am mistaken, there are no photos or videos of destroyed Russian equipment or deceased personnel from this counteroffensive, and the Ukrainians are known to publish any footage they can get with absurd fervor. To date, Ukraine has never been able to make a video like this
"Screening zone"
"We are happy you took the time to apply. Unfortunately, we won’t be proceeding to the next step of the process with you on this position, as our requirements were not a match with your experience."