The TK10 is tougher, has a simpler UI, and is more efficient. I personally love the 2 modes - 60 lumens for 13 hours and 225 lumens for over an hour. However, it is not the light I recommend because you may need more throw to investigate things further away.
I have owned both the Tiablo A9 and Tiablo MA6. The A9 was too large, felt hollow, and was poorly fit together. I sold it shortly after I bought it. The MA6 left the opposite impression. The light is extremely well made, the only flaw being the plastic reflector retaining ring. Compact enough to be perfectly acceptable for a go to light, although still somewhat bulky. We have some very fine lights designed for flood, like the Fenix P3D, and other very fine lights for throw, like the Dereelight DBS. I think the MA6 is the only compromise that really works (compromise of length and not batteries, that is). The multimode pill can be set to come on at either high or low, and the light comes with a forward clicky too. Don't forget to read my MA6 review:
https://www.candlepowerforums.com/threads/192922. I didn't even bother to review the A9. However, others have had better luck...
To give you an idea of how far the flashlights will reach, here is the lux at 1m of a few. Keep in mind this is intensity at the brightest point - overall output is about the same. And these may not be perfectly accurate, but they are accurate relative to each other.
Fenix P3D - 3,500 lux
Fenix TK10 - 6,000 lux
Dereelight CL1H - 10,000 lux
Tiablo MA6 - 16,000 lux
Tiablo A9 - 20,000 lux
Dereelight DBS - 30,000 lux