Benz Ruby Z vs Decca Jubilee w/SME M2-12r

So,
looking at both of these cartridges -

to go on a Thorens TD-124 with a new SME M2-12r - the SME arm has 18g effective mass, and both seem to be a good match.

i've heard that Decca's are either AWESOME or dreadful depending on the arm.

The benz seems like a safe bet and both carts are $$$ anyone have experience with either car - particularly with the SME arm i own?

Thanks

Aaron