I prefer the L6 because of its better mode spacing, feel, superior build quality, and it’s no-stepdown high mode.
I have both the S70 and L6.
The in-hand feel of the L6 beats the S70 both in balance, and in weight. The S70 is very head heavy. The L6 is almost perfectly balanced. The knurling of the L6 beats the smooth ridges on the S70 by a huge margin. It makes the tube feel slimmer and easier to grab, especially because there’s no logo flat on the tube like on the S70. It has an AR lens, while the S70 does not.
Throw is almost the same, though the L6 beats the S70 slightly.
I measured 517 meters from the L6, and 496 meters from the S70.
The L6 has a perfect hotspot, and the S70 shows a doughnut hole.
Also, build quality is different.
From an earlier post of mine:
The S70 has a shiny anodization that feels a bit cheap (ok, really cheap). Which is weird because it’s younger brother, the S50, has incredible anodization.
The S70 is riddled with sharp edges. The place where the body meets the threads that connect to the head have already cut two o-rings. The cooling fins don’t have a bevel at the edges. Even the tailcap has these long ovals machined that are sharp feeling (although provide good grip to remove the tailcap). The removable ring is also a bit sharp to hold. There’s lots of small pits and dents throughout the aluminum body.
In use, none of those things are a problem. My biggest complaint is the shiny ano though. Most of the sharp edges aren’t felt by the hand unless you purposely try and feel for them, but they’re there.
The L6 on the other hand is freaking incredible. Every edge has a bevel to it, so there’s no sharpness to be felt. The anodizing is perfect. It’s not as matte as a Convoy/Thorfire C8, and not as shiny as a standard quality ano. And the knurling is so well done, it beats the pleasure ridges on the S70 by a lot.
The S70 has it’s place. I’d only give an L6 to people that are well informed about the use of lights (basically just me). If I was gifting a light to anyone else not informed (basically everyone I know), it’d be the S70. The turbo timer and battery indicator are awesome features.