I've been using FreeDOS for a really long time. Decades.
https://www.freedos.org/

I'm all for new stuff, new emulators, new toys.
But if I had a job to do, I'd probably go with FreeDOS, because its THE standard.
There isn't a whole lot of info on the SvarDOS page that might allow you to differentiate their offering from FreeDOS.
- It doesn't have version numbers, which does not actually sound like a good thing to me.
- It has an online package manager. You know, like FreeDOS does with FDNPKG16.
So ... I want to know more, but this seems a bit sketch to me.
Edit: Their site is shit. Took me a while to find this.
*** Why would I want to use SvarDOS instead of FreeDOS? ***
http://svardos.org/phpamb.php?fname=help%2Fhelp-en&f=freedos.ama
Dunno. I'm not buying the reasoning. ...
... But then again, I've heard less coherent reasons to fork the code.