-- Brett
...and since this was a pretty basic question let me focus on just one
difference between the two chords: the half-step between the dominant 7
and the major 7.
The word major in that chord's name indicates that the seventh note in
the scale is raised a half-step over the same chord without that
designation in the name. Same applies with a Major 9th chord - the
seventh is again a half-step higher than in a plain 9th
Frank
Thanks! I guess this is why I posted this question on this list :)