I have edited the description of my latest planes, if you read it, you might see I talk about some kind of class ranking, here’s what it is:

-For plane:
+Class 1: Bad
+Class 2: Decent
+Class 3: Good
+Class 4: Super

-For pilot:
+Class 1: Decent
+Class 2: Good
+Class 3: Super

Both of those ranking can be combined to decide the overall class:
+Class 1: Very bad
+Class 2: Bad
+Class 3: Decent
+Class 4: Good
+Class 5: Very good
+Class 6: Super
+Class 7: Unbeatable (new category)

For example, Reisen has a Class 4 aircraft and she’s a Class 2 pilot, that makes her a Class 6 which is super; Youmu has a Class 3 plane and she’s a Class 3 pilot, that makes her a Class 6.

The words after class x are ally, enemy or unknown target. For example, from Gensokyo’s side, Marisa is a Class 7 ally, while on Japanese side, she’s a Class 7 enemy.

Well, that’s all.