See Djozz’s test
It’s a flat lens version of the SST-40, that is also upgraded, usually a flat lens versions lose about 10~15% compared to the domed version because light extraction is worse (there are less reflections back to the die with a dome, see CREE presentation about flat lenses ), from the test you can see there is no loss of lumens despite that and it takes a bit more current.
So it’s a powerfull, throwy LED, that is easy to drive like the SST-40 because it’s 3V.