correct me if i am wrong, but im pretty sure soviet airdrop can be dropped anywhere (eg. mainbase) while Ostheers can only be dropped on ressource points.
You are completely right: The Soviet version costs 100 munitions for 30 sometimes only 20 fuel the upside is that the ressources are easy to capture (can only be used in basesectors) , while the Ostheer version can bring either 150 munitions or 50 fuel for 200 manpower (can only be dropped on ressource points) and is only counterable by head on assaulting the position in under 60s not with any anti air guns.
I would personally prefer to make the soviet supply drop less risky if overperforming maybe less beneficial by lowering the fuel value to 20-25 or increasing the cooldown. Otherwise maps like Lienne Forest or Lorch Assault especially in 4v4 not 3v3 might get annoying to play as it will be hard to push through half the map and atleast on axis player can surprise the enemy team with early p4s, brummbars or pwerfers.
In 1v1s both abilities are "fine" and the commanders hardly used in the current high level meta, but in teamgames the abilities one ability is hardly ever useful the other one atleast sometimes if you want to mix stuff up.