An Earl Grey Latte and a London Fog are essentially the same thing, if you’re adding sugar to your earl grey latte. However, because an Earl Grey Latte contains the word ‘latte,’ it will be made with frothed milk and no sweetener. If you add a pump of vanilla or simple syrup to your earl grey latte, they essentially become the same thing. Both a London Fog and an Earl Grey Latte contain Earl Grey tea, milk and a sweetener.