I'm using this as an example, but it rings true of the Kotobukiya version as well, the film's Runner's got asymmetrical features in the detailing in the texture but not in the overall shape. In that way it is as symmetrical as the Warrior and Drone before it.
See the way even though each side of the head has slightly different details, ditto for the arms and legs, overall it's very symmetrical?
That's not true of NECA's offering.
It's much more messy looking than either the suit or rod puppet the Prime 1 statue more faithfully accurately represents. The sculptor with NECA made the bizarre choice to make each arm and leg completely different looking in both shape and detailing from one and other. But that's not all.
The head itself's dome's also slanted to one side.
You can see here it's almost sliding to the left. It's not that even round shape from the front that it is meant to be.
Consequently the right side of the head's fairly accurate with that lovely almost semicircular curve where the flesh meets the dome but... the right arm's not, especially where it meets the elbow.
With the left side, you can see not only's the detail lacking and incorrect, at the back of the dome it begins in a curve and then goes mostly in a very slight curve that's almost a straight line by comparison to the other side of the head. Then look at the left arm where it meets the elbow and you will see it is much more accurate.
The rod puppet for good measure.
The only thing NECA gets right that Prime 1 does wrong's the details on each shoulder, that you can also see done correctly on the Kotobukiya, the only representation I know of to get every detail and shape
completely correct.