Keygos do a range of flashlight torches, from which 3 are single cell flashlights. The KE-1, KE-2, KE-5.
From my initial comparison, the KE-1 and KE-2 have a similar body to an Ultrafire C8. The KE-5 is similar to Ultrafire U-80. They all have smooth reflectors and CREE XML-T6 LED, but the insides are different. All have the same 5 memory modes, but the KE-5 has an aluminous button and will tail stand.
The KE-1 appears to be the weakest and cheapest flashlight, and the beam has the most spread.
The KE-2 (with the silver bezel) is a powerful flashlight with good throw and tight beam but also giving more wider illumination. It is middle priced of the 3, but we are only talking a small difference between them all.
The KE-5 is Keygos' top torch of the 3 and is slightly the most expensive. It is a powerful flashlight with a tight narror beam and has the furthest throw of the 3. (The mode memory did not work on this torch :( )
I personally prefer the KE-2 because this flashlight has excellent throw and I think it is better for all round use. I prefer the beam. The mode memory also worked. I just wished it also had the aluminous button. I suppose it all depends on what you want it for...