@Sabex On one hand Russia keeps dumping cannon fodder into the conflict. On the other hand Ukraine is doing the same, but are dying at lower rate. While Russia can go on via conscription, Ukraine is scrambling to pull/extradite draft dodgers from other parts of Europe.
Russia has a lot of expensive and barely maintained and kitted hardware, where Ukraine is getting all the toys to play with.
The question is if Ukraine can keep the pressure up and be able to outlast Russia's ongoing attacks, while they are able to do so now, I honestly doubt Ukraine can keep this up. Next year we'll how a nation gets subject to Russia.