Completely different circumstances. Even if this report was true, since we don't know if it is, you re comparing it to a horribly wrong situation.
The Russians are fighting an actual conventional military, without air support, without modern equipment, and under the guise of being federalists/separatists.
To put it into context for you, how well do you think US soldiers would have done if they were fighting with the same weapons and equipment as insurgents and they had zero networking and zero air support. Also add that instead of fighting insurgents they are fighting a large conventional army.
Losses would be....different to say the least.