The most recent group of people to class up, half went to VT-10, the other half went to VT-4. It is generally pretty random unless you know someone. I know one guy who got to pick his squadron and he was able to get another guy in the same squadron with him. If you cozy up to the ladies that make the class up list each week you might be able to get the squadron you want.
As a side note, I'm not sure one is better than the other. They both have their pros and cons as any command will, but one is not necessarily better than the other. Instructors come and go and commands change. In the end I guess it just depends on what things you prefer.