Basically the REV D divertor Valve is OEM and its been redesign so it will last almost forever even on mapped cars (however no difference in performance). Its alot better than previous Revisions because its Piston driven instead of using Diaphram kinda like rubber material which is prone to rip under high temp (for us FR, TFSI sport owns the Divertor Valve is next to the turbo so it will get hot and rip.
The HKS SSQV2 I can't comment at all...however it discards the divertor valve the oem one altogether and it does the job by itself however I pefer it all oem with only one difference, having the spacer from forge which gives the woosh woosh sound.
Stew as you have a Cupra your DV is already relocated at the front of the engine bay so its easy enough to upgrade to the newer one thats if you need too. If the old DV rips (diaphram it will not throw any DTC codes however the car will run like a pig...). err hope this helps. (repeated for the x amount time already) heh.