First off, thanks for the heads up with the sale.
I was able to have a chat with a sales rep to confirm that facial mocap can be exported on a ue4 skeleton. Will be reading through the full documentation and probably make the purchase by the end of the week.
In terms of character creator 2 what i noticed was that in tutorial the texture fidelity and even head construction appears of a different standard, which made me think it was not a cc character. One thing that stands out to me is the presence of the tear line on the tutorial mesh, a small strip of geometry that bridges the eye lid and eye surface to allow for visual indication of the reflection from the liquid that occurs there in reality
https://imgur.com/a/yMi1D , though i do note the absence of a mesh hanging from the upper eyelid to fake AO which i would want to add.
For non hero characters, grunts etc, the quality of the shot from the character creator website would be acceptable. But for hero characters a quality of the tutorial character would be necessary if not higher. Now a lot of that can be in texture, and thats no problem i can do a custom high poly or work in substance painter to deal with that. It's even possible i can deal with the lack of tear line and ao faking mesh by importing them skinned to the same mesh like you would hair of clothing so that it would not interfere with vertex order and thus morphs, but if the image on the website is indicate of a previous version, of the tutorial head is indicative of a new standard would love to have details.