E.S. Kim,
all else equal, 360mm radiator is unlikely to outperform a 280mm radiator in a meaningful way. When you can't get more than 2C of difference, it might as well be human error and or standard variation from components.
* rough estimate of 360 radiator surface area = 120*120*3=43,200 mm
* rough estimate of 280 radiator surface area = 140*140*2=39,200mm
* while this math is not the right way to calculate, but looking at about 10% difference, that difference doesn't translate into meaningful performance gap
240 and 280 are ideal for the proportions and cooling capacity I'm going for.
I only added the 280mm radiator support for Threadripper builds.