A question about bar codes

In it's most basic form, there is no difference in the barcode itself, only in the human readable number underneath.

Here's a good explaination of the two from https://www.nationwidebarcode.com/are-upc-a-and-ean-13-the-same/

"if you are currently doing business in the United States and Canada exclusively, it is safer to order UPC barcodes for your products. Many retailers, especially smaller retailers may be using older accounting and inventory systems that only allow them to enter in 12 digit UPC numbers and not a 13 digit string. If this changes in the future, you can convert your 12 digit UPC to a 13 digit EAN by adding in the country code 0. There is nothing on the horizon indicating that the US and Canada will ever switch over to EAN 13 barcodes"

Also;

" US and Canada have a a country code of zero which is not printed under the barcode nor is it entered in US and Canadian Inventory and Point of Sale Databases."

I'm glad you have decided to never grow up.... because the wisdom you just posted is priceless. Thank you so much.