How can I make the vimdiff command use the same Vim version as the vi and vim commands?

I've never worried about vimdiff on my own computer, where I have archlinux installed, so everything is up-to-date, generally speaking; I generally just used it, and I'm fine with it. After all, :version gives the same output whether I launch vi, or vim, or vimdiff. On my work computer (Debian 10), however, vimdiff opens an older version of Vim than vi or vim. I guess this has to do possibly with how I installed Vim and/or with /etc/alternatives or something. It's been a long time I played around with such stuff though (without truly understanding it, likely), so I don't remember much. --- **Feedback on [the answer](https://unix.stackexchange.com/a/695929/164309)** and comment(s)

ls -lF /etc/alternatives/ | grep bin/vim | sed 's/.*-> //' | sort -u

rsults in just in one result, namely /usr/bin/vim.gtk*. How is it possible, then, that vimdiff and vim open different versions? Or have I misunderstood the answer? The output of type -a vimdiff is

vimdiff is /usr/bin/vimdiff
vimdiff is /bin/vimdiff

output of: type -a vim

vim is aliased to `/home/me/vim-dist/bin/vim'
vim is /usr/bin/vim
vim is /bin/vim

output of type -a vi:

vi is aliased to `/home/me/vim-dist/bin/vim'
vi is /usr/bin/vi
vi is /bin/vi

Both /bin/vim --version | head -n 1 and /usr/bin/vim --version | head -n 1 have the same output:

VIM - Vi IMproved 8.1 (2018 May 18, compiled Jun 15 2019 16:41:15)

and that's the version that runs when I execute vimdiff, older than the one that runs when I execute vim/vi.