Voxxed: Microservices Versus SOA in Practice

Microservices Versus SOA in Practice
So microservices and SOA have a lot in common. They are both systems that typically contain sets of loosely coupled distributed components. However, the intention behind the two architectures is very different: SOA is trying to integrate applications and typically uses a central governance model to ensure that applications can interoperate. Microservices is trying to deploy new features and scale development organizations quickly and efficiently. It focuses on decentralization of governance, code reuse, and automation to do this.
To summarize:

Feature	SOA	Microservices
component size	large piece of business logic	single task or small piece of business logic
coupling	generally loosely coupled	always loosely coupled
organizational structure	any	small, dedicated cross-functional teams
governance	focus on centralized governance	focus on decentralized governance
goals	to ensure applications can interoperate	to deploy new features and scale development organizations quickly