The current density which you are running the LED at has a lot to do with it. The SST-90 is a large LED and you are only driving it at 1A/mm^2. So the benefit will probably be a bit smaller. But it should still make measureable difference!
Even it it gets you just 10°C difference, I think it’s still worth it. It’s a 3$ upgrade…
It will make your light more robust, even when used in extreme climates. As long as can hold the flashlight without burning yourself the LED will never become too hot.
What I noticed is that the red zone is not spreading. With a DTP star I would expect that to spread and maybe take up most of the star allowing it to transfer heat from the entire star into the underlying pill or shelf.