Looks like you may be asking where to add the extra strip of fabric, not the color? If so, I would alternate adding to the top of one and the bottom of the next, etc so the printed/embroidered designs would not all be in a straight line which might just emphasize any variances.

I like the bottom one too.

Even with enlarging the photo, I don't see a difference. The fabric used is NOT making the applique POP.