Porter, Lager, Pale Ale, etc...? | Yahoo Answers
2006-12-31 · Best Answer: For starters, the type of yeast that is used. Porters, Stout's and all ales are made with ale yeast, which is top fermenting and works well at room temp. Lagers (Pilsner is a style of lager) are brewed with lager yeast which works well at cooler temps.