#3) Keygos KE-5, mine is driven at at 3.6A, it's a thrower. Ebay dealer Go-Market has them on sale for $19.79 right now. Mine is well made and very bright.
I'm guessing that you know what you're going to receive (ie. which driver, which tint) and the fact that it's customizable for tint and modes. The Keygos seems to be a lottery of which driver will be in it (many reports of under-driven ones).
The fit, finish and quality of parts make the XinTD seem more like a Fenix or other upscale flashlight than a budget light.
The finish and machining on mine are perfect. The Nanjg 105C driver is reliable and even after you buy it the mode pattern can be changed. That is because the stars you solder on are on the battery side of the circuit board.
Some features that the KE-5 has better are that it is somewhat brighter and a little lighter weight. My KE-5 is driven at 3.6A, Direct Drive while the XinTD is 2.8A regulated.
The Keygos is nice, but overall the XinTD is a big step up, considering that the difference is only $10.
I believe the XinTD C8 is considered the better here, because of the excellent driver Nanjg105 which you can choose if you want 3 or 5 modes, blinky or not, and also CW o NW emitter.
It's slightly longer than the Ultrafire C8 and clones, but look at the pics down in the page, the massive bronze screw-in pill for the emitter, which is also screwed to the SMO reflector.