SUMMARY: Spain produced 2 different Terror Claws Skeletor Variants. The Soft head and the Hard head.
Both figures share the same accessories (same color and mold), and the bodies are very similar. Where they differ is in the boot color, and in the dramatically different heads. The skin tones on both bodies are the light blue seen on Spain Skeletors, as opposed to the turquoise-blue that is seen on HK Terror Claws figures.
The white dragon attachment has a white mouth, and is a cream colored white as opposed to the bright white of a HK dragon. The painted chest armor is a darker, duller purple. The clip is slightly more orange.
Soft Head: The soft head Terror Claw Skeletor is rare. It has lighter blue boots, and the head is very similar to a France Skeletor head. It has the 2 diagonal lines between the eyes at an angle. The painted chest armor might be slightly brighter than on the hard head, but it's unclear to me if this is just a case of small factory variance or a legitimate difference.
Hard Head: The hard head Terror Claw Skeletor is the most common of the 2 variants. It has a Hard head semi-similar to an HK TC, but the yellow paint is rounder and covers a smaller area on the face. It also has much more red in the eyes than the HK. The boots on this figure are a dark purple, close to the black of the shorts.