As headline says,
is the Ducati Performance clutch slave made by Oberon?
Looks like it.
What slave do you prefer?
No idea who makes the DP slave. Can't go wrong with Oberon.
Why? On which bike?
Stock bore? New bore?
AFAIK/IIRC ... ? ... DP was 28mm vs many other aftermarket cylinders at or over 30mm
Replacing it.
MTS 1100s.
32 mm.
I think Oberon is 29....
That'll help quite a lot. The wet clutches require a modest bore, to have enough throw between fully engaged and fully disengaged.