AA 48 battery pack $12.94 ($0.27 / count after $6 OFF)

I know it’s over-hyped Amazon Prime day promotion but in case you want to buy from Amazon this might be for you
https://www.amazon.ca/AmazonBasics-Perf … YIK6Y9EEQB

$13.91 price at Costco after $4.50 OFF
https://www.costco.ca/hardware-batterie … BSignature

anyone know if Amazon’s are really high performance? what’s the mAh difference?