Dexcool with its pure organic inhibitor package is as good, maybe better, than MB brand/Zerex G-05, which is a "hybrid" - basically an organic inhibitor package with a little bit of silicate.
The real bad actor in the antifreeze world is the traditional green stuff. It has an inorganic inhibitor package - lots of silicates and other salts. They provide good corrosion protection, but the salts precipitate out in the radiator tubes, so you have a nice corrosion free, but clogged radiator. Either way it's toast!
On a traditional brass radiator you can unsolder the tanks and "rod out" the deposits, but modern aluminum radiators are not usually serviceable.