Hi
Both brands you're mentioned are good brands which delivers good quality. Are they comparable? That's hard to justified.
When ones ordering a skid package, most likely all related equipment will be sized and designed from the same (parent) companies. It is possible but not common to have a KSB pump however installed for example Flowserve or Emerson valve next to it.
It is a logical business practice that inter-companies such as pump division share information to their valve colleague over process condition, trip function, etc.
To compare valve quality and reliability among one another, at least you need: a very identical process condition (and no deviation on process throughout valve lifetime/pump mtbf/etc.), similar valves' material, an exact same maintenance strategy using a similar OEM spare parts and a periodically record-able valves' finger print such as hysteresis, stroke/response time, seating force, etc.
This is a long observation and discipline strategy that should be done in accordance with dedicated protocols (if not done the same person for the next 20 years

).
And replacing valve A after 20 years in service with valve B, is not necessarily justifies that valve B is better than valve A.
Regards,
MR
All valves will last for years, except the ones that were poorly manufactured; are still wrongly operated and or were wrongly selected