I can’t be sure from the pics but I find the dome on fake cree XMLs is usually hard while it’s fairly squishy on the real XML. I am not saying go and poke random leds but that is how I can tell. If I can’t tell from looking at it. If you have a real t6 around you might able to tell by looking at them side by side.
How’s the tint the lattice bright usually have a crud tint? But this may have changed.