Slightly is an opinion, and might be true, from a certain point of view. In reality, the XC is pretty much like an FE version with axial fans. The FTW goes through serious binning first, then rigorous testing to see if it passes Evga standards. If it fails they still sell it, but as the FTW-D which gets downgraded to an XC, but has the FTW cooling and OC ability.
Physically, the FTW has far superior cooling, so even the FTW-D will run cooler and quieter than an XC under heavy loads. While the clocks can put a 3080 FTW at almost a 3090 ability, that's putting a FTW up against the next class up XC.
So there is a sizable advantage to the FTW over an XC, it just doesn't translate well into FPS. And for many ppl, the price difference doesn't justify the FPS difference. Slightly is an FPS perspective, but for those with lousy airflow cases, or uber heavy gaming loads, having a cooler running better cooling gpu can be a bonus that gets them the FPS in the first place without throttling the card.