Ali Baba 318,
BTW, you also run your business by that name? :) sorry, could not resist :)
I have had the ET Aureus, the B9 V1.2, the Projet 1200 and currently own an Ember. Since your question is directed towards ability to cast direct, I will focus my answer to just that aspect.
If you compare Ember to B9, using as sole criteria their ability to produce castable patterns out of the box, clearly it's a no brainer. B9 Creations has 3 different resins to choose from, Autodesk currently offers none. This is expected to change, and probably so will my answer. I will add though, casting-wise, the type/brand of printer is not important, many of the ones you mentioned are not locked to handle a specific resin.
One thing I have to add, there are resins such as ET's EC500 which are quite easier to cast, but do not produce a a high definition/crisp detail.
I know my answer is not very helpful, but I hope it will assist you and other users understand the multiple facets of the criteria you should consider when making a purchasing decision.