Lovely!!
I would quilt them both the same way. Outline the tree/ornament and micro stiple around them in the white/black area to make each of them pop and stand out (or some other small filler). SITD around the outer edge of the bargello and either SITD the center between the red and green .. or SITD the center bars of the bargello where it touches the border of the table runner (the thickest and the thinnest bargello columns).