From what i have experinced they are different - cant tell you exactly which is which but i bought a gasket set from Ford for my Fiesta Turbo asked for cvh gasket and the cork one delivered didnt fit...

So i ordered a rubber one

Be careful when you order - best bet is to take yours off and match it..

When you re-fit it if you use the rubber one use spray glue to stick it on the sump.

then it makes it easy when re-fitting.

Just dont overtighten, nip the bolts up then run up to operating temp check for leaks and then nip up bolts again once.