[Marcello]

"So esentially the 2B is a dual charge warhead"

Not exactly.There are two warheads but it is not a multicharge, the two warheads point in different directions. The TOW-2B, or the BILL 2 for that matter, are not "top attack" in the same sense the Javelin is. They fly horizontally like like a conventional ATGM but instead of hitting the tank directly they overfly it.When the missile is above the target the warheads, which point towards the ground, are ignited. This is less complicated than a Javelin style approach.