Differences between JVM implementations

Question

Where do JVM Implementations differ (except licensing)? Does every JVM implement Type Erasure for the Generic handling?

Where are the differences between:

Answer 1

Things like type erasure are done by the compiler to be backward compatible with older JVMs. Most JVMs should support all the features you need, but some may be more optimized than others. I'm guessing the Sun JVM is probably the fastest.