The only specs I know of are published here:
https://downloads.evolvapor.com/dna200.pdf
And certainly some folks post help me topics when they see a 0.01 ohm change, yes, even when switching devices. I try to follow the Evolv guidelines when using Escibe software to get as close as I can to an accurate baseline. But once you get into the world of different Atty materials, wire materials, the entire connection path, at some point you hope you've done enough homework and trouble shooting to just enjoy a good vape.
Now don't take all that the wrong way, I enjoy the process, and in most cases it's no where near that complicated. But as I wrote to you before, in some cases, depending on knowing the person I'm advising, I recommend very simple to use devices, with no computer hookups, or TCR values to worry about.
Before little inexpensive devices like the Pico, if someone wanted to learn what a TCR is, I knew that was the cutoff, and that person wanted to move up to move advanced devices. Now with many new devices including TCR input, many new vapors are curious about those settings. It's both good and bad, some like added complexity, others want to just keep it simple and just want or need a power mode for Kanthal at 15 watts, and as long as they are happy, and avoid smoking, it's all good!