I have also worked with Aurea Sonic, or simply Sonic. initially, our company was using Aurea Sonic. However, they later upgraded to Oracle Service Bus, which is why I started using Oracle Service Bus as well. Currently, I am working with both.

Right now, we're doing some due diligence before buying a product. The concept is the same in all the products, only the components are different, the way of integration also are different but the concept is same with the ESB. That's what we are discussing with the technical team. We might look at TIBCO or other things such as MuleSoft.

The main difference I see between Service Bus and other solutions is the cloud. The newer products coming out are cloud-native. Service Bus lacks that because it was not initially on the cloud. It needs to be more cloud-native. 

Before choosing this product, we did not evaluate other options. We only explored different Oracle alternatives.

Mule ESB is another solution that we have a dedicated team for and a lot of experience with. It is very powerful and we felt that in this particular scenario, Oracle had an edge. Mule out-of-the-box is missing a lot of features that Oracle has, and we see this year that Oracle is getting much better than Mule.

Another reason that Oracle was selected over Mule ESB is because of the pricing.