Which One Is More Musical? 

When I go from a 3-note chord (triad) to a 4-note chord, I must resolve

one note of the triad up and down to form the 4th note of the new chord. 

This I call a split (X).

For example, going from a I chord to a V7 chord.

Did I split the 3rd and lower the root (X3 -1) ?

Or did I split the root and raise the 3rd (XR +1)?

Musically, which one did I do?

I would like to have one explanation regardless of the inversion of the chords.