Well there is plus and minus as always .. (6 foot cords)
HD cords lots of tags (6) to cut off but softer cable and thinner insulation, so it bends easier and you can get an extra cable into a connector. Runs 96 cents so it is a few pennies more. Case size is 24. Normally 5 to 10 cases are in stock at a time and they stock more frequently. About every 2 or 3 days
Walmart cords thicker insulation but the same rating, and stiffer, likely be a tough bend in the winter, I don't know it does not get winter here. Runs 94 cents, Case size 12 cords, they normally don't carry but a few cases so several trips are required ... maybe spending the 24 cents you saved on extra trips. Restocking is longer ... about a week
all in all it is mostly a wash ...