What is the military power of the Belarus, compared to the neighbor states, in particular, Poland?

The reports like those from GlobalFirePower seems to be based on sheer numbers, but one thing is having 600 tanks, another, what are those tanks and are they maintained/operational?

I remember the case of Breivik, where no helicopter was operational (able to be used immediately), which in case of sudden attack usually means, your airforce is destroyed before it takes off…

Are there any publicly available studies comparing the military potential, based on the training level, maintenance, performance in the international military missions etc.?