Question about the 2 "Vana'diel March" songs that Mizuta Naoshi contributes to the FFXI OST: besides Uematsu's "Prelude," what are Uematsu motifs are incorporated in Mizuta's marches?

When I look online for the song credits, Mizuta is always the credited composer and yet, unless my memory is bumbling things around, most of the "Vana'diel March" content seems to be Uematsu melodies. Am I right?