Soviet Aircraft in War Thunder usually have guns with a high rate of fire and a high ammo capacity, or come equipped with fewer large caliber cannons. Soviet planes have large rewards at an earlier tier and beginners may find it easier to use Soviet planes as they are a bit stronger. However, while they come with large cannons, they don't have as much maneuverability as other countries, such as Japan and Britain
Soviet Aircraft are reliable when it comes to attacking, while their defensive capabilities are narrowed down to if you can out maneuver your opponent due to weak armor, you will experience loss of tail control or loss of wings a lot.
With Weaponry commonly found near the engine, it is easier to aim in dog fights or trying to catch them on the turn. The odd planes with 20mm Cannon's is a good way to go bomber hunting with burning out there engines. Which helps when there are a few USSR planes that have this armament.