I came away more impressed with Azure after my 2 day visit to the Microsoft Tech Center, as were our software architects and machine learning guys.
Some items of note I found superior to AWS:
AutoML: Will test run your dataset against about 100 different deep learning models/algorithms to find the model with the best convergence.
Cosmos DB: More friendly to database admins and developers than DynamoDB, with more features (like SQL-like query available)
https://db-engines.com/en/system/Amazon+DynamoDB%3BMicrosoft+Azure+Cosmos+DB%3BMongoDBBot Service: Easily integrates with Azure cognitive services (voice to text, image ID/classification, faceID, translation and language detection, etc); build just one bot and deploy it automatically to webchat, Facebook, Line, Skype, Teams, Kik, Slack, etc. No customization for each channel needed!
https://dev.botframework.com/