Originally Posted by
Edellis
It's not so much the neck itself, but the more exaggerated trapezius muscles that make them look alot stronger up there than the other races, similar to the Roe. That's the muscle group that's more pronounced in the artwork, thats nearly non-existent in the model. So while both versions have long necks and muscles, the in-game model immediately looks much weaker.
In the artwork, the Au Ra don't look just massive in muscle like the Roe, but very well defined. And oddly enough missing that one detail kind of makes their whole upper body look weak.