The one in the game. It isn't a lowres leftover from dom2. Those are the only things in dom3 that are a real eyesore and should be replaced first, imo.
I think he is saying that the wyrm sprite is fuzzy and indistinct. I get the same impression -- like I'm looking at an old red-and-blue separate-image 3D they used in movies, but without the goofy glasses. It could most certainly use a sharpening-up, but yes, it's clearly not as bad as some.
I agree with Globu. The wyrm image in the game is not bad. It just doesn't do justice to one of the most magnificent monsters in dom-III universe. Wyrm is the stuff of legends, it exists in one way or another in almost every sea faring culture. The image should be on par with the legend