I would recommend the Developer only because it's specific to knowing and understanding the services (and related SDK's) for the different services you can consume.
For example, using DynamoDB instead of Mongo, using S3 instead of NFS/Fileshares/Local Storage, using Elastic Beanstalk for easy/automatic deployment of code, and the list goes on.
This is the next Cert I'm work on, I currently have the AWS Solutions Architect.