cooling advicea aio

Hi, I'd like to ask if an AIO Pump is better to be set at a constant speed (60%, 80%, 100%, etc), or curve based on the CPU Temps? I did asked around, and some of them said it's better to keep it at constant to prevent wear, other says it's okay to have it on curve. Now I am confused and idk...

I'm thinking of swapping out my current aio to https://www.overclockers.co.uk/ek-water-blocks-ek-nucleus-aio-cr360-dark-all-in-one-cpu-water-cooler-360-hs-016-ek.html or either https://www.awd-it.co.uk/nxzt-kraken-360-black-non-rgb-aio-cooler-rl-kn360-b1.html and canr decide what one to chose...