I recently had a few rolls of black and white film developed. When choosing options for 4-inch prints, I could either opt to have color prints or, for an extra cost, true black and white prints. I opted to have one of my rolls printed on true black and white gelatin paper, and the other on color paper.
In the end, I couldn't see a difference between the true gelatin black and white prints and the black and white roll printed on color paper.
Is there a concrete, conceivable reason why I would want to have my black and white rolls printed on true black and white gelatin paper if I just intend to use them for personal use, or is it just a marketing gimmick?