Today I passed cx-310-093 exam with score 75%. I know it`s not high. There are few points which I want to share with you.
1) There are a lot questions about new features in ejb 3.1, such as singleton beans, asynchronous invocations, packaging ejb into war and standalone ejb environment. During preparation I skiped packaging and deployment section of specififcation, so my score in this topic is only 25.
2) Other questions are very similar to scbcd 5. So you can use any preparation kit for scbcd 5 to prepare
3) As I remember there were no questions about ejb 2 compatibility
4) In my opinion the best material to prepare is ejb specification, but Ivan Krizsan's study guide is very useful too.