I agree. I have 2 TX25C2s w/ Fet drivers, so I decided to put a White 1 in one light, and a White 2 in the other. Personally, I think the White 1 is better fitted for this size reflector. Such a beautiful hotspot. It is noticeably brighter than the Black Flat too (I was able to compare the 2 side by side).
The White 1 in my TX25C2 produces a brighter hotspot than the White 2 in my GT Micro. If the same results aren't achieved in the TX25C it's because the little 16340 can push enough current. But that shouldn't really be a problem because of the much lower Vf in the White LEDs.
It's funny how for years we didn't seem to have much use for linear drivers, now we're scrambling for them to extract the full potential of these new LEDs. It's kinda refreshing