Basically the filming miniatures were identical but differed in the weathering, depending on what should be achieved. To my surprise the right side of the plane was very hard to come by. There are far more views at the left side. However, here are two miniatures with different weathering:
This is the cleaner hero model which I used as a base. You can see the big panel on the snout.
However, there is another, heavily weathered version which looks like this:
You can see that the panel was horizontally divided in two halves with different shading.
So you can vary the appearance a bit. However, do not make both sides symmetrical. The asymmetry of the panel lines and detail plates is one of the most defining aspects of the Viper and the Cylon Raider.