I'm try to develop transaction service. So I want to check balance and continue transaction in one service call (balance checking and paying services are two separate services). I think, I must use one of Enterprise Service Bus(ESB) to overcome this. What is the better ESB(WSO2 esb or Mule esb)?
The answer of type of question depends on user's experience and expertise over the tools.
You can find may links on internet comparing these tools like https://www.linkedin.com/grp/post/36781-178821575