Blurb trade books paper comparison - "Economy, Color" and "Standard, Color"

This video shows two test prints of a Blurb "trade" book - "Economy, Color" and "Standard, Color" . everything else is the same about these books. the 2 types of paper— "Economy, Color" and "Standard, Color"— are the same weight. And the 2 books I have are the same weight. Bottom line is that they look identical to me. I asked if it is possible they were printed on the same paper by accident? I will update here if they get back to me. Good news is that it looks great! 4 options for Trade Books (Uncoated Paper)Paper Weight 1 Economy, Black and White Text and line art 50# (75 GSM) 24-480 pages 2 Economy, Color Graphics, vector art, or little pops of text color 70# (105 GSM) 24-480 pages 3 Standard, Black and White Text, illustrations and line art 50# (75 GSM) 24-480 pages 4 Standard, Color Any kind of photos, paintings, collage, illustrations, or graphics 70# (105 GSM) 24-480 pages see this link for details: https://support.blurb.com/hc/en-us/ar... *** for more about my series see: https://arisalomon.com/6-feet-apart/ my book includes 2 guest writers: Renny Pritikin was chief curator of The Contemporary Jewish Museum in San Francisco. He wrote a short curatorial response written for 5 Years, 6 Feet Apart called “The Aesthetics of Peril and Panic”. Christopher Lee is a medical epidemiologist focused on global epidemic and pandemic preparedness, detection, and response. He wrote a short essay written for 5 Years, 6 Feet Apart, a personal reflection of his COVID experience titled “Lines, Loss, and the Gravity of Time“ *** learn more about my work: https://arisalomon.com