Why do you think that? In terms of overall size ours may actually be the largest. The only major between all 3 is the difference in angle Hogsmeade faces in relation to the castle.
Here's a graphic I put together assuming Hollywood's follows Japans layout a bit closer of all 3 in relation to Howarts castle and the forbidden journey building. This is also assuming that all 3 Hogwarts/Journey buildings are identical in size.