Q: hey, what's the difference between a sus2 and a 9 chord? sorry if that's a stupid question
A: if you see Csus2 on paper, it probably means you need the notes C, D, G. and the bass note would be C. If you see C9 on paper, it probably means you need Bb, D, and E, and optional G if you like mild suffocation. and C in the bass