Basically the only reason why the CLCs seem superior is because they have higher speed fans. After adjusting for noise, they are inferior.
There are various other issues with CLCs
Pump dying
Leaking (the worst since it can damage other components)
Fluid loss due to evaporation
Tubing getting punctured (vulnerable)
All for something that does not cool well as the best towers. I wonder if a 360 CLC could close the gap. It's a huge risk just for something that looks like watercooling but is not as good.