We test on all of them since we build observability solutions. We run a ridiculous amount of tests on every commit. There are minor differences, but not stuff y

We test on all of them since we build observability solutions. We run a ridiculous amount of tests on every commit. There are minor differences, but not stuff you would notice when you build an app. If you do notice it then you have a bug in your code. IBM is probably the biggest difference since they do a lot of work on their JVM and have the most changes.