Like you, I don't really care for stickerless puzzles, and I also love the new QiYi sticker shades. I bought a black Wuque for those reasons alone.I'm trying to decide between the stickerless and the black WuQue.
For the record, the reviews for the Wuque are overwhelmingly positive regardless of version. The only place I've seen such fanatical praise for the stickerless one is around here. I can't really draw my own contrasts between the two versions, only having tried the black one, but it is definitely my best 4x4.
I guess my point is: *If* there is a performance increase in the stickerless version, that's cool, but since the black version is already main-worthy in it's own right, the sticker shades and better recognition are worth the trade off to me.