You can use Graal for both JIT and AOT workloads. The JIT version works just like hotspot, but it's better with memory allocation and collection due to better optimizations. I have yet to see an application where it has performed worse than hotspot, although they may exist.

Ive read that the EE version can do PGO (you profile the app in a profiling mode, outputting a profile file which is used in a subsequent AOT compile), but I personally have no desire to talk to an oracle salesman ever again, so I'll just stick to JIT.