I've done this mod on 5 lamps, two were my own and three were for friends.
Three were done with the whiter color emitter and two were with the more yellow color.
I am not an incredibly picky guy and use these in caves which are quite monochromatic and the two different emitters are equivalent to me: neither seems brighter, more pleasant, or better to my eye.
When compared side by side, the color difference is noticeable, but if I only had one, I would be very happy with whichever one I had.
Sorry, but I don't know anything about your third option.