What's the difference between the telnetd and inetutils-telnetd packages in Ubuntu?

1. Recently, a work came to me which needs to set telnet on linemode.so i install telnetd with apt install telnetd, which is controlled by inetd, and this operation will add new line telnet stream tcp nowait telnetd /usr/sbin/tcpd /usr/sbin/in.telnetd in /etc/inetd.conf 2. after install telnetd by this way, i tried many ways to enable linemode in telnet service yet all failed ,so i removed telnetd by apt remove telnetd 3. then i reinstall telnetd by apt install inetutils-telnetd, this operation also add new line in /etc/inetd.conf which is telnet stream tcp nowait telnetd /usr/sbin/tcpd /usr/sbin/telnetd.after doing this, i add a -l option in this line and restart telnetd. in this way, line mode is enabled and works well. 4. althrough work is finished, but still can't i figure out why these two ways are different. what's the difference between these packages telnetd and inetutils-telnetd