I explained the difference in my post, rather vaguely I guess.
Harakiri is the less formal ritual of seppuku...... I guess it would be less formal in that there would not always be a second there to take the head with a sword.
To my mind, both are still reserved for those with some semblance of honor.
you are right on the honor part.
I had always believed the two were one and the same.
Thanks for the info