You might want to take a look at these threads:
I’ll quote myself from that first thread:
’I have both and myself would recommend the Skyray king. It is very nearly as bright compared to the DRYs 30 second Turbo mode, is shorter, and carries 4 cells, so you fit 1/3 extra power in the same size body. I also prefer the side switch, and I like the fact that there is no internal battery carrier. The batteries are also wired in parallel so it is a safer set-up than the DRY.
The only real benefits that the DRY has are that it has more lower modes, an automatic step-down to a more sensible level (so it can be left to light up a room without overheating), and less noticable PWM.
Both have been reliable, but I blew 2 drivers on the DRY when taking tailcap current measurements, so don’t do that with it unless you are extremely careful not to slip. I also had to replace one of the LEDs as it burned out, but that may have just been a freak occurance.
Overall, I would say the King wins hands down if you can find a good one…’ I would now say ‘for under $50’ from a reputable dealer. It’s seems harder to find an original now. So you may need to look into which retailer sells the best version at the best price.