When running dependency tree (version 2.8) using maven 3, the generated tree is consistent with what maven is using.
If you enable -Dverbose, I have a maven 2 dependency tree:
It's very misleading. Even the documentation doesn't mention it.
Probably there's a good reason to not use Aether for the verbose mode, but I guess at least it should print a warning at the end of the process and explicitly say it in the documentation.