Rahr sells 6-row, do you have access to someone who can order from Brewers Supply Group?
As to your question, I don't know for sure about the Weyermann product but 6-row is higher in enzymes.
Edited to add: oops I see you're across the pond, Weyermann might be closer to domestic for you. And out of curiosity, why are you looking for 6-row? Today's 2-row malts have some excellent enzyme content, just look at the diastatic power values to decide how uch adjunct you can use.