Its impossible to know for sure without trying to pick each fiber apart individually, but the MX4 is stated as having "heat cross" which is like a film thats shrunk around the line to form a coating. In comparison, they state that the Grappler has "Heat Sink", but don't say much about it. It may be the same coating, but who knows. Either way, it sounds like neither of the lines are fused together, they are just coated.
I Just realizei i have a kairiki 8 with vt and i can separate the strands in the same maner. Só the vt and mx4 coating are diferent. The mx4 is a stiff line.
