Are boys to men and all for one the same bands?

No, Boyz II Men and All-4-One are not the same bands; they are distinct musical groups. Boyz II Men, formed in the early 1990s, is known for their smooth R&B harmonies and ballads, while All-4-One, also formed in the 1990s, is recognized for their pop and R&B hits, including their famous cover of "I Swear." Both groups have enjoyed significant success in the same era, but they have different styles and musical identities.