I'll use your own shot for my explanation Niko.

(1) Top half of the comparison screen shows the squad's strength (aka Quality), based on the top 14 players of the team in question. It's the average of their combined quality. This way you can judge what kind of team you're facing.

(2) Bottom half of the comparison screen shows the Defence, Midfield, Attack capabilities of a team's current setup. It's based on the 11 players present in the team's current line-up (starting 11). This way you can judge what're the capabilities of the opponent with his/her current player setup.

Click image for larger version. 

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