1.) Food (Taco Bell Grande And Fire Sauce Mixed With A Taco 12 Pack) -- Protein Spotter / Pure O2
2.) Drink (I Told My Kids Not To Drink Juice In Here) - Red Zone Ready
3.) Urine (Little Dog Terrorists With Parental Sympathizers) Peroxide Based Spotter
4.) Grease (The Work Boot I Don't Know How...
I guess I'll ask what you need the dual wand system for? If you're doing long hose run commercial then the 870 is the way to go. Mainly dual residential then the 570 is the way to go. Just depends on where you take it
Now I wouldn't hands down say it works better. I still lean towards Grout Master. It's tried and true in my book. But I'm not the one cleaning... I asked my guys this question too and they said if it was really bad they would use the grout master because they are 100% sure of its performance.