Ben & Jerry's Phish Food

Calories 270
Fat 12 g
Cost 87 cents

Ben & Jerry's Light Phish Food

Calories 210
Fat 6 g
Cost 91 cents

Light is a bit less flavorful. It's sweeter, with less intense chocolate flavor and more artificial-vanilla flavor from the marshmallows.

Häagen-Dazs Coffee

Calories 260
Fat 17 g
Cost $1.07

Häagen-Dazs Five Coffee

Calories 220
Fat 12 g
Cost $1.17

Both are very high in quality, with real coffee flavor, but the lower-fat Five is slightly denser and even creamier than the regular.

Edy's/Dreyer's Grand Mint Chocolate Chip

Calories 170
Fat 9 g
Cost 33 cents

Edy's/Dreyer's Slow Churned Light Mint Chocolate Chip

Calories 120
Fat 4.5 g
Cost 42 cents

Both are minty, with lots of big, flavorful chips. Light is a bit more airy and gummy.

Breyers All Natural Butter Pecan

Calories 150
Fat 10 g
Cost 40 cents

Breyers Smooth & Dreamy Light Butter Pecan

Calories 130
Fat 5 g
Cost 40 cents

Both are tasty, but they differ in style. Light is sweeter and tastes more buttery.