Ok. I had a pretty good listen and formed an opinion. The Django sound very good with plenty of energy and drive but they lack the refinement of the K10.
If your budget does not stretch to the K10 then I think that there is a lot to like about the Django. It has the sound of a quality CIEM. I just do not think that it is an endgame product. The K10 is.
Having said that, I was very tempted by the Dulce Bass as a compliment to the K10.
Watagump is right IMHO when he says that the Dulce is very special in not simply being all about the bass. Other frequencies are available.
I couldn't live with it full time but as a second IEM for listening to bass driven music... I heard the Katana and would not consider it a companion for the K10. I think it is a situation which requires you to make a choice. Not buy both. Again IMHO.