There is a big difference! The Catholic school uniformity comes explicitly and unabashedly from above and as a result often instills the life-long disgust for authority in right-minded individuals. The corporate standards of fashion, by contrast, are imposed from above just as the Catholic school uniformity is - but they are cleverly disguised as "individual choice." As a result, people slavishly follow them without even knowing that they are being remotely controlled. Worse yet, they defend the corporate yoke as the epitome of "individual freedom," as it is often the case in the US.
Wojtek