Roundup Weed & Grass Killer Super Concentrate and RoundUp Pro Concentrate are just manufactured by different companies. One is manufactured by Scott's and is considered consumer grade (store bought) and Roundup Pro Concentrate is manufactured by Monsanto and considered professional grade. They both contain the same active ingredient and instructions.
Once Roundup Weed & Grass Killer Super Concentrate has been mixed, it can only stay mixed for 24 hours. After 24 hours it should be disposed of