I think it depends on your values, as well as your child.
My daughter is 3 and a half. She is very bright,
academically. She can count, knows her letters and sounds,
loves to read. I'm not worried about academics.
However, my daughter DOES need help socially. When she's
with other kids, she plays alone. She usually won't talk to
adults besides her parents. She is in a toddler soccer
league and acts like she's afraid of the coach (who is super
For my daughter, a play-based preschool is the best choice.
She needs to learn the social skills!
Also remember - you don't need to pick a super-insense
academic or a strictly-play-based preschool. Many schools
offer a nice balance of both.
Think carefully about your son, and what he needs. Then your
decision will be easy.
I wish your son much success as he enters his school years!