9W charges YQ for redemption on EY flights. I haven't personally redeemed miles on partner awards, however, I have been told that there are a few EK segments that don't involve YQ charge.

The best way to find out the YQ component, would be to use ITA Matrix and scan the fare component for YQ. If you happen to find any 9W FFP partner offering a fare without YQ, you can compare that offer with EY.

Good Luck.!

PS: The YQ component for J / F class fare should ideally have marginal or no difference.