MG MP vs MG Pro; confusing data

[MiMy]

Unstrung specs from Head's site (weight/balance):
MP 320g/310mm (~10 points headlight)
Pro 325g/315mm (~9 points headllight)

TW:s measurements (strung):
MP 335g/6 points headlight
Pro 343g/7 points headlight

Isn't this slightly conflicting? Or a tolerance issue?

[the Town Sherif]

think about it, the MP has more mains and crosses when strung than the pro does, therefore it will add more mass due to strings.

[MiMy]

Yep, but it's only 3 more string lines, and that adds weight perhaps ~1 gram. I don't think that's enough.

[meowmix]

Yeah, it's a tolerance issue. Since TW does its own weighing, it takes a couple sticks from Head, strings em up w/ a basic (I think syn) string, weighs them and takes the average. This makes it a little different than the target specs from Head.