Before and after shots of the 158 for comparison of detail / accuracy
Before:
After:
I guess you need a good eye for detail to tell the difference (there's a LOT of differences actually). In general, this should look much more realistic in game than before as a whole. Window rims, and more detail on the front are the most obvious changes, but there are also a lot of changes to the shape overall to fix incorrect proportions.
Also, the "before" image is probably not a great comparison. The original 158 didn't have baked shadows or normal maps. Both of these will be present in the new model.