15.22LTS vs Edge

You'll encounter Mule runtime release-channel terminology such as:

LTS
Edge

High level:

LTS

More stability/support-oriented.

Edge

Newer/faster-moving release stream.

You do not need exact current versions memorized.

For production:

Choose the runtime channel/version according to the organization's support policy and connector compatibility.

Current Mule Maven deployment docs explicitly distinguish release channels and Java versions in runtime configuration.