The authors stated that Russia will be able to assemble and send 51 to 68 battalions to Northern Europe in a week. But NATO will be able to send only from 29 to 43 battalions. That is, the advantage remains with Russia.
In addition, the RF has larger ground units with heavy weapons and better defenses and firepower. Russia possesses a large number of artillery and ground air defense systems. Russia also has good opportunities to conduct electronic warfare. In addition, it will be easier for the Russian military to get reinforcements. NATO has troops in different countries.
The author concludes that Russia has a better chance of winning.