No, it is the same issue. If you want to establish an action as immoral (here the war), you have to establish an alternativ action that is more preferable.
Sanctions were held up as the only realistic peaceful alternativ to war - from stopping Saddam murdering and torturing his own and foreign citicens. That's why they were imposed by the UN.
The sanctions were especially harmful to Iraqi civilians, while Saddam was seemingly unaffected by them. They lasted for about 13 years, and is reported to have caused about 300 000-500 000 infant/child deaths alone.(some say over a million, but that is not the consensus AFAI can tell) I could not find numbers for adults.
http://en.wikipedia.org/wiki/Sanctions_against_Iraq#Estimates_of_deaths_due_to_sanctions
In light of this, the sanctions killed more people each year than the Iraqi war, even by the lowest estimates. 23 076>20 000 . (if we count the war from 2003-2013, but I have no idea how you got the number 200 000, let alone accounted for the moral implications that most deaths probably are from terrorist attacks from foreign and nationals, amongst others, Iranian and Syrian terrorists).
And even worse: Sanctions demonstrably didn't work. As someone said, the sanctions were a new Iraq war perpetrated to the Iraqi people every year.