Which clam chowder is healthier?

Well, yes, you're right - but one of them is almost 200 calories more per serving. While it's not a total bargain (tomato-based Manhattan clam chowder is a better bet), New England clam chowder wins the distinction because it is made with milk or cream, while lobster bisque is made with heavy cream.

Does clam chowder make you gain weight?

Although clam chowder is not a low-calorie food, it does provide you with some essential nutrients, and you can still include it – in moderation – in a healthy meal plan. But overindulging in clam chowder, especially New England clam chowder, can cause you exceed your daily calorie allotment and gain weight.