Depends on the thrust rating set for climb thrust by maintenance. When we first received the Neo in 2019, unless very heavy flex thrust was = to CLB thrust. So no effect on the thrust value when moving the levers from Flex back to Climb detent. The climb thrust was ridiculously high and vertical speed of 6000 feet per min was not uncommon at 250kt And they would still climb at 2500 feet/min at 320 kt. Then with the high vibration issue on the PW engines, they downgraded by like 10% the thrust on the climb and now Climb thrust is always less thrust than the highest flex. Our Neos climb performance are very similar to CEO; just a tat better. On the CEO I believe climb thrust is always lower then the highest flex. Not sure by how much.