Looks like they are on par and well below 50 ms (Vim = zero plugin, Neovim = 5 plugins):
» time /usr/bin/vim +q /usr/bin/vim +q 0,02s user 0,01s system 79% cpu 0,036 total ~ » time nvim +qa nvim +qa 0,03s user 0,02s system 79% cpu 0,062 total