There are more but I enjoy leaving them a surprise so you guys can do the research yourselves or get spoiled on the update =D
Ever so slight change on the top of the weapon. Had to check it myself but the particle effects are a cool redish, pink color when you shoot which is very nice. That also goes for the new Dark Reaper weapon =D
IIRC... I think it was in their last Twitch... Nathan was asked about adding more weapons. His response was that bE could easily make more weapons but that making more weapons would be a waste of time and effort for the devs because they don't add much to the game in terms of content.
Er sorry I didn't even think it would have a cosmetic difference if even that slight, just gotten used to recolors for Eldar/Orkz being "unique" when Marines get nice new skins. What I meant was stat-wise everything appears to be exactly the same as the base ASC but I finally saw it's the SIPs and recoil being ever so slightly less.