When we use diff to compare old and new VIs, currently both the FP and BD open and the FP is on top. But frequently the FP hasn't changed at all -- the API can stay the same while making substantive changes internally. So in cases where there is no FP diff, please put the diagram window in front. That would make reviews of large quantity of small changes (like replacing a commonly used subVI with a new subVI) easier to quickly review.
