There is some of the usual tint shift towards greener at low currents and pinker on turbo, but it’s nothing out of the ordinary (Latticepower version).
As to turbo brightness vs runtime, I find it’s perfect for my purposes but I’m not looking to put out 4300 lumens for any length of time. I only need it for a minor fraction of a minute, often just 5 or 10 seconds. That allows me to use such a small light, which would require a much heavier body and more battery capacity to sustain such high output. But I would be unlikely to need that kind of output/runtime and wouldn’t want to routinely carry the heavier light it would require.