If you want to know this:
edwardlaneuk wrote:

and this:


Then, I guess the simplest way would be to see the rank of your score and compare it to the rank attained by other people.

Example:
In a certain Scenario X, you score 50 points in a Pfalz and your opponent scores 70 points in a Snipe.

We compare your 50 points with all the scores of all people picking your Pfalz in that scenario and we find out that, let's say, your 50 points is the 3rd best score ever.
So you score rank is 3.

Then we compare the 70 points of the Snipe to all the scores attained by Snipe pilots in all games of that scenario, and we find out that 70 points is pretty common and it's actually just the 122th best score ever.
So Snipe's score rank is 122.

Since you attained Rank 3 vs 122, we will say that you performed better.

Infact, your performance was almost better than all Pfalz before, while Snipe's one was common

I think it would be interesting to add this information somewhere, but I don't think I would attribute the "yellow box" win on that. According to the game rules, it's a Snipe victory