The top pic is probably more of the new capital ship for the Vasari. Looks scary to me, can't wait to blow it up!

Mid i'm gonna guess is a Vas titan, and the bottom an Advent, and i'm judging that by the color of the text rather than the look. The Mid pic looks very much vasari, but the bottom one i can't entirely tell whether it's one or the other except for the text.

They all look awesome though. Wonder what they cost, and how much pain it will bring my enemies when i kill them.

I found this after reading the interview...  http://www.rtsguru.com/game/197/Sins-of-a-Solar-Empire/screenshots/6669.html 

EDIT:

Hard to say what it is, but thanks for posting!

If it truly is an Advent titan, the thing must be huge. Also, there seems to be some kind of "flying soucer" that is seperate from the rest of the ship. I wonder what that is supposed to be.

Well all the Advent ships have names that mean something in English, (Rapture/Halycon etc.), and while at first I didn't think the Cyhyraeth followed that pattern, I quick look on wikipedia informs me its some Welsh banshee like creature, which while a bit different from the other Advent ships certainly fits them. Perhaps this slight change in nomenclature indicates the Cyhyraeth is a Rebel ship?

Also from wikipedia, Nigredo was once a alchemy concept for decay, but psychology has since taken over the term to mean the process of when an individual confronts the darkness within themselves. Which does follow quite well with the previous ship names.

A Cherubim is of course the little guy below, from Judeo-Christian mythology and fits with the religious based meanings of previous advent ships, and seems to be the basis for the odd ship shape. So I suppose it does make a little sense to call it that instead of a battleship or whatever.

Though the devs might have had this sort of version more in mind.

Good background info. I figured there was some meaning to the names that matched advent.

Yes...stand in wonder of me.

Much like this guy:

I must point out that the concept that a Cherubim is an angelic, infantile-appearing being is of 'more recent' nature than the far older, and more traditionally held in the more fundamental Christian circles, that Cherubim are creatures of fearsome demeanor and power- though, naturally, they are nothing compared to God.

To organic for me.

I personally quite like the names of the three concepts in the OP.

So what you are saying then is the the Cherubim really will be named "The Watto" upon release.

Cool! 

Hmmmm.... the Cyhyraeth looks a bit strange to me, in the 'head' section. It might just be because this is concept art and it looks different that a 3d model, but that looks too... asymetrical? organic?

On the other hand, the texture is right on the Cherubim, but the shape feels a little too delicate.

All the current advent ships have a polished, shiny, paladin look to them. The 'head' on the Cyhyraeth looks organic or grown, not plated in polished metal, like I would expect for the advent. Again, it probably looks different in-game.

Thanks for releasing more concept art! I'm excited to see what the Cyhyraeth can do.

Isaiahs' seraphim had six wings but Ezekiel's cherubim had 4, along with the faces of a lion, ox, eagle, and man; and calf feet. 

That's right. I got my faces confused. (How often do you hear that?) Seraphim also translate as fiery serpents, so that would make them highly discernible. Too bad that drawing is off by one feature.

All the same, the Cherubim only appear when something has to be buried. Not Sodom kinda buried. I mean you're never gonna know it really existed buried.