"There is a legal definition of genocide and Darfur does not meet that legal standard. The atrocities were horrible but I don't think it qualifies to be called genocide," he said.
Washington is almost alone in branding the 4 1/2 years of violence in Darfur genocide. Khartoum rejects the term, European governments are reluctant to use it and a U.N.-appointed commission of inquiry found no genocide, but that some individuals may have acted with genocidal intent.
Carter, whose charitable foundation, the Carter Center, worked to establish the International Criminal Court (ICC), said Khartoum should hand over to the ICC a junior government minister and militia leader wanted for war crimes.
Carter said it was unacceptable that Khartoum had appointed the suspect, State Minister for Humanitarian Affairs Ahmed Haroun, as head of a rights committee.
Tutu said the delegation had received a "tale of two countries", from different sides, outlining the complexity of Sudan's multiple conflicts.
"I thank God for the humanitarian workers," he said. "They run the gauntlet of being assaulted, abducted but yet they come back for more. They are superb, they make me proud to be human."
Veteran peace mediator Lakhdar Brahimi said uniting rebels before talks due to start on Oct. 27 in Libya was crucial, but warned against "pampering" self-declared representatives.
"I very frankly believe that the international community has acted rather irresponsibly...by pampering a lot of these people around, not really wondering whether they really represent communities," he said.
Mainly non-Arab rebels took up arms in 2003 in Darfur accusing the central government of neglecting the remote western region. Khartoum mobilised mainly Arab militias to quell the revolt.
The African Union mediated a peace deal in May 2006 but only one of three rebel negotiating factions signed it. Since then the rebels have split into a dozen factions.
