That first model isn't an MC90; EJ made a specific MC90 which is in SoGE. That model is, I believe, a Strident-class Star Defender.
Yes as I told before, if you look the warlords site screenshots http://warlords.swrebellion.com/wp/ probably he made it as the Viscount, perhaps some people see it very strange but when he made the model, there was not canon design for the Viscount. Of course I use it as a MC90, personally it is my favourite design from all EJ mon cal. About the MC90 from EJ, I have at least two different skins for it, one blue and one green but by several reasons I do not go to use it, at least a first moment. The same will happen with the MC80C or B or Mon Remonda as you know it, I will use the JM design, it is very different to the EJ design, if you want know, I have at least two new skins for the EJ design and at least three or four (I do not remember) for the JM design with different colours and details. I tell it if somebody from SOASE wants use them, I will not stop to nobody from it and when I can, I will upload several models to the soase modders skydrive editor list, only I need found some of free time for this.
And now remembering, the last strident star defender from EJ never was released, if you check the screenshots, there is a model with many good changes on the design. Probably there are a lot of EJ never released, the New Corellian Destroyer was other by example. Some people perhaps do not like them but I like a lot the EJ designs, most of them are fantastic and they were made with very few information, it was a huge and great work.