What is "b'Oshri"?
Rashbam: Girls approve of and praise me. 1
Malbim: It is happiness of the Nefesh. She did not have Hatzlachah (success in this world), for my husband does not love her.
Ha'amek Davar: He was born due to my praise and happiness.
What is "Isheruni Banos"?
Tosfos ha'Shalem (5): Daughters of Asher were beautiful.
Malbim: Everyone considers me happy, and a Bas Olam ha'Ba, and approve of my deeds, through which I merited this.
Ha'amek Davar: Girls of the generation approved of my act (giving Zilpah to Yaakov).