As far as the contract goes, Noriko's far more benevolent with regards to the Samasus. As Linka noted, Noriko pretty much gives the Samasus extensive free reign unlike the Fiend. In fact unlike the Fiend, she heavily prefers most of the Samasus make their own choices and have their own quirks and personalities.

One could construe Noriko's ultimately doing this as a favor since a lot of important people in her life are Samasus. Shikou is a brother figure to her despite issues. Souha is a very close friend and spouse. Suguru is a friend. Etc.