The fisherman compared the two fish.
Japanese life and American life aren't a good comparison.
Who took the picture of Koichi’s nose? I really love the contrast between the light and the shadows.
You're comparing something to another thing, each versus one another. When you do that, you look at both sides. You contrast each and then you come up with a comparison.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.