Well, I have never tasted the Lamb meat, but I do not really think it is way too different than the Goat's meat, I have tried Goat meat, we call them "Chivos" in my country, the meat is really smooth and soft, it has a good taste, especially when you mix the meat with some potatoes, tomatoes, and some peppers to add the spicy touch, it's really delicious, it also depends on how you cook it, I highly recommend it.
It is tough yeah and has a disgusting stench but it certainly doesn't taste like chicken.A lot of people say that most meat you've never had before tends to taste like chicken, but I'd imagine goat meat to be quite tough and dry, depending on how it's cooked of course.
Goat meat is generally chewier as compared to lamb but if you cook goat meat on slow heat for longer then it becomes very tender especially in gravies.
Goat meat also has a lot lesser fat at least the goat meat here in India has less fat, cannot say about goat breeds available abroad.