Why does AWS have two services to deploy Docker (one "Infra" and one "Platform")?

When I look at the AWS product summary here:

http://aws.amazon.com/

There is an "Infra" offering called EC2 Container Service:

http://ift.tt/1BhNYHi

There is also a "Plaform" offering called Elastic Beanstalk (w/ Docker support):

http://ift.tt/n5SK7j

Why does AWS have two ways to deploy Docker and why are they across both the Infra. and Platform categories?