Difference between using Collections SDK and Postman API?

Hi,

I’m integrating Postman into my Continuous Integration system. I want to create, update and publish some collections from my CI server. I see there are 2 options: the Postman-API and the Collections SDK.

My question: is the SDK just a wrapper around the API? Can I do everything the SDK does with the API? Or is there any special advantage in using the SDK?