The more you practice, the more you'll recognize which sound has more powerful - that is less compressed one. The other sound will have less powerful but normally louder. Another trick, putting your hand on the desk you can feel which one stronger

Listen to the kick and snare. Less compressed will feel 'spiky' or 'sharp'. More compressed will feel soft or round. For me, it's the game that involves the most feeling instead of thought. Also, listen to the room around the mic. When it's more compressed you will tend to hear more of the room in some of the recordings.