So the DNA 40 still beats the DNA 75 in higher ohm builds

[VapingModeration]

Looking at the spec sheet we see a 6V max for the DNA 75 while the DNA 40 goes on up to 9V. 
So on the DNA 40 you can get 40W@~2ohms
While on the 75 you can get 40W@.9ohms
and on the 200 you can get 40W@~2ohms
Is there a reason for limiting the upper voltages other than power saving?

[VapingBad]

I was discussed, but it would have costs in other areas like the min resistance, I have ran builds as low as 0.03 ohm on it, they work fine, but that is a bit too current hungry for the keystone battery sled, 0.05 ohm runs very well.  I think one thing that was difficult with the 40 was the min res restricted what you could build with Ni too much and I for one am really glad they did it this way.

[VapingModeration]

Yeah, I keep a DNA40 handy now for just such purposes. I can't say I'm happy that super subohmers won out over much less current hungry higher ohm builds. DNA's being able to fire a screwdriver isn't news to me. lolol.
Either way, I have the perfect enclosure for the 75 that will be parallel 18650.
 

[VapingBad]

I understand what you mean, but it's more like temp limiting and Ni got the prize than sub-ohmers, it is a real issue if you want to dual coil on the 40 with Ni.

[VapingModeration]

Yeah I just noticed in Ni-mode it won't rise to the .9ohm @ 40w the device should be capable of. That is strange.
I don't use Ni myself anymore so that's moot benefit for me. I'm in the SS316L FTW camp. In and out of TC, SS tastes wonderful.