Hi Hugger
The Ultra chassis is similar to our Eclipse which is now in its 6th year now .
Ultra supports the pan American market very well ,where as Akasa supports the European territories to its best abilities.
The Mirage is 2yrs old using the same framework but after customers views that didn't like the plastic door and did not support water cooling too well it was born "Omega" sporting Heavy Alumiumium front door and new extra gaming features that are that differentiator to the past.