Clutch and DMF help

Hi

I just want some reassurance before I go splurging R5500 on DMF.

My mech has told me I can use the 150kw clutch if I get the 150kw DMF. Is this right?

And does anyone know the difference between the two? What warrants the double price tag on the 135kw clutch?

My car is a 135kw 330d.

Thanks