>>31577827Because they had more time for those. They already had a full region from BW, had to make no new Pokemon after BW, the soundtrack was mostly the same. Even with all of those, they took 2 fucking years to release BW2.
For SM, they had to make 3D models, not sprites, for all the humans and Pokemon, a 3D region, had to make an actual story with good characters, and add a shit ton of gimmicks. And they still had only 2 years.
Basically, there was no way BW2 wouldn't have more content than SM.