No real advantage differentiating them usually except psychology lessons help - like using smaller plates or getting dopamine elsewhere. Things get complicated though.
I follow someone on a community who really knows peptides. Asked him about a specific stack with NAD+. His protocol: SS-31 at 1mg daily with NAD+ 100mg three times a week for the first month, then add MOTS-C and the amino compound from weeks 5-8, keeping NAD+ the same.
I ran 5mg daily for three weeks, then repeated. Honestly the reconstituting was a pain so I stuck with that amount. Heard some folks do cycles with way higher daily doses but never felt the need to push it.