I would just have them all lined with white fabric, and then it will look nice from outside.

I don't think it matters if you have a Roman shade on one window and curtains on the other. Sometimes shades are up or down, or curtains are pulled closed or pulled back. I think of that as normal use, and I'm sure the flower boxes will look very nice if you keep up on the plant care.

Often different rooms need different window coverings si I agree just white on the lining Usually best ot post pics of the psaces and the house whan asking questions . Those can be posted in comments DO NOT start another post.