I wonder how much current this light is pushing through the emitter–6951 lumens at turn-on seems unrealistic. Djozz’s test of the SBT90.2 stopped at 20A, and the LED never broke 5300 lumens, and these are bare LED lumens without the 10%-15% loss of the optical system. Assuming the output/current curve is quadratic the LED never breaks around 5500 even at higher currents. Either one of these tests is off, or the SBT90.2 has received a silent upgrade in the meantime.
Your test of the Astrolux EC01X, which uses the same emitter, indicates a turbo of 5100 lumens, and your test of the Amutorch XT70 shows 5200 lumens. These numbers seem more consistent with what djozz has.