Is Cinebench reflective of what you use the system for?
Without question, either cooler would be good with an 11400. But the FUMA 2 doing it for ~50% more than the other option? That's a hard pill to swallow.
Reminds me why I can't in good conscience ever recommend the NH-U12A to anyone: it's a great air cooler, but too darn expensive. Noctua's awesome Secu-firm mounting kit, plus dual NF-A12x25 fans is not enough to justify that ridiculous price.
Sadly, there's very few reviews out there that actually put the FUMA 2 on a big cpu that would push it hard enough to show its weaknesses:
-FUMA 2's lighter weight leads it to start falling behind heavier air coolers on higher heat load chips, or in scenarios where you have the cpu sucking power willy-nilly.
-The cooler has no extra headroom available to it either, due to the low noise focused fans. What you get out of the box is pretty much it.
I would argue that both FUMA 2 and Freezer 34 could have trouble with an 11900 if you just raise the power limits, as well as both coolers being capable of handling it ok if the cpu is reigned in; there's reviews out there with the 11900K on small coolers, and they manage with few performance deficits, as long as the cpu isn't allowed to go full retard.
All coolers will benefit from toning down the voltage the cpu normally gets on auto, leading to easier to manage thermals and power use.
TL;DR: I think my response is more, "don't just 'unlock' it"[assuming Cinebench reflects the main use of the PC. Because for CB and the like, the Intel-defined power limits are a bit conservative and do get in the way].