Their are some differences,, many of what we call a "limited slip" diff are what, (in the old days,) were referred to as a "positraction" unit.
They use spring-loaded clutches, and usually some form of "ramp" to tighten the clutch pack,, as such they are known as a "speed sensing" unit,, and their must be some wheel slip for them to "engage" beyond the force of the springs,, the springs set the operational range of the unit.
The "Torsen" type is totally operated by a combination of spur and helical gearing, and is a "torque sensing" unit,, and they are in continuous operation, and shift the torque bias from one side to the other in real time as necessary, and in a seamless manner.
They use spring-loaded clutches, and usually some form of "ramp" to tighten the clutch pack,, as such they are known as a "speed sensing" unit,, and their must be some wheel slip for them to "engage" beyond the force of the springs,, the springs set the operational range of the unit.
The "Torsen" type is totally operated by a combination of spur and helical gearing, and is a "torque sensing" unit,, and they are in continuous operation, and shift the torque bias from one side to the other in real time as necessary, and in a seamless manner.