Liquid cooling is really air cooling, it just puts the heat exchange in a different place.
The orientation of the radiator will cause a problem.
If you orient it to take in cool air from the outside, you will cool the cpu better, but the hot air then circulates inside the case heating up the graphics card and motherboard.
If you orient it to exhaust(which I think is better) , then your cpu cooling will be less effective because it uses pre heated case air.
Because radiators are somewhat restrictive, a liquid cooler needs a stronger and noisier fan than a liquid cooler.
And... an air cooler will never leak.
Really, though, I am very interested in your actual temperature experience.