I use eight of the 10W from RobG and I tried one of Ray Wu's WS2811 10W floods this year. There's really no difference in performance/light intensity.
Word of advice from experience: Unless you are good at soldering PCBs, buy a couple extra of the RobG floods. That way if your soldering sucks (and you don't find out until the temperatures are cold and things contract), you have a spare to quickly replace the one you screwed up.