I play with both m/kb and controller depending on how I’m feeling and I’ve noticed that a few things act differently with m/kb.
Skills that have an extended range function a lot better on m/kb. An example is the Druid Trample. With m/kb I can trample MUCH further than with a controller.
The mount also acts differently. With m/kb, you can use all 3 speed boosts at the same time for a massive boost. With a controller this just flat out doesn’t work, and you waste the boosts.