My little analysis of Russian and Ukrainian armies based on two weeks of war.
Russians have quite well modernized tanks and modern jets. But their jets lack target pods and guided bombs. Even in their own propaganda video there are only dumb bombs:
Thats why whenever Russian jets want to hit some military target they need to come low and became a target for MANPADS.
Russian soldiers lack ceramic vests, knee pads, red dot sights and most important night googles. Russian army is simply unable to lead night offensives which is a standard mode for Western armies.
Russian army does not have normal divisions. Instead they use BTG - battalion tactical groups. Thats very bad for coordination.
The initial Russuan tactics was to advance rapidly from all directions and shock the Ukrainians. As result wheeled vehicles came in front and tanks lagged behind, huge number of wheeled vehicles were destroyed and later significant number of tanks which were left without support. But in south that tactics however worked not bad.
Now Russians came back to their usual modus operandi: slowly wiping everything. The strong side of Russia is that they have very low sensitivity to losses.
There is very little i can tell about the Ukrainian army. It looks to me more like some rebel force rather a conventional army. They can defend territory, make ambushes, but unable to lead mobile warfare. Their air force, air defence, artillery is amature at most.