This is an interesting discussion, but just out of curiosity why would it be necessary to use a different glass cleaner on the interior glass vs. the exterior glass? I get that you don't necessarily need the additional hydrophobic protection on the inside of your glass, but if you are happy with your exterior glass choice and it is window tint safe why not just stick with that? What am I missing? Enlighten me please...
I've always been a fan of Stoner's Invisible Glass w/rain repellent and used it religiously for years. Then I decided to give Wolfgang Perfekt Vision Glass Cleaner a try... Wow what a great product! Expensive, and I get that you would not want to use it for detailing customer cars if you're trying to make a profit (sounds like D120 is the hands down choice for that!), but what a great glass cleaner/protectant. For a weekend warrior just looking for the "best" to take care of his or her own vehicles with - Wolfgang Perfekt Vision Glass Cleaner is the bomb! Oh and I use it on the interior glass in addition to the exterior...
Wolfgang Perfekt Vision Glass Cleaner, tint safe glass cleaner