Each is distinctly different. Choices were made, primarily sight distances for playability and HP (hit points) that determine how many hits your vessel can take. The only way to make this game more realistic as constructed would be to make the guns less accurate and more significantly deadly, so when you hit, appropriate degradation would happen*, and by doing away with the health scale. When you are hit, the primary result is a loss of health, you may have a resulting fire which erodes health, or damaged equipment, which can be repaired.
*War Thunder actually has a more realistic setup, where when you are hit, there is usually significant loss of capability, not just taking from a health pool.