I have a Razesa and I was told that the Razesa company was contracted to make the higher end frames for Zues. I haven't confirmed this but the details on my Razesa are very nice and it is made of SLX so I know that they make a fine product.
Lets see pics of your other bikes
Oh, and since you are a Zeus-o-phile, have you ever seen Zeus or Razesa decals anywhere?