The FFL505A gets definitely cooler at higher currents, but it stays very rosy all the time. At higher currents it is better - but if we are honest - most of the time we are powering our LED at lower currents - and this is where light quality should be the best.
For me, the FFL505A is simply too rosy. -0.005 or so would be perfect for me, that’s why I love my 519A.
Absolutely. The ‘Yinding 6500 K 95 CRI’ one showed what good light quality and perfect beam means. This for neutral white and slightly negative duv and this LED will be very popular. (If also marketed properly at flashlight enthusiasts.)