[Cyberdemon]

I'll refer to the article that just got posted re: 228/235/M2 - on a tight race track, the M2 with it's fancy diff, extra horsepower and bigger tires was less than a half second faster than a M235i with it's eLSD.

At the limit the mechanical LSD is more predictable, but functionally the eLSD does what it needs to by properly sorting out calculations dynamically hundreds of times a second, rather than a mechanical LSD which has very specific behavior characteristics which are static.

The newer torque vectoring diffs use clutch packs on the diff to provide that computer level control to each wheel, which is arguably the best of both the mechanical and computerized worlds.