My vote goes to Spacemacs. Doom is fine and comparing them is not very useful because they give you by default almost the same packages.
Not only that, they also don’t restrict you to add more packages, you can totally add all Spacemacs packages to Doom and all Doom packages to Spacemacs.
Why Spacemacs then? Because it does in my opinion more heavy lifting than Doom. Examples:
Doom doesn’t turn off the quit dialog of Emacs by default, Space does
Space adds more shortcuts through auto-evilification than Doom (notably Space gives a bind to org-time-stamp-inactive and Doom doesn’t)
Space has a little better documentation than Doom; some packages in Doom have pages but lack configuration and usage sections
Now, all of these can be addressed in Doom, but Space wins for me because I don’t have to do the extra steps. And if you’re going to make me learn your way of configuring emacs, I want you to then do more work for me so I just add a few packages, change a handful of variables and I move to learn the shortcuts.
I’m gonna try SandS, sounds interesting