There are several:
- The most noticeable difference will be the flavors. KC 1.9 uses off the shelf flavored protein powder. KC 2.0 uses a proprietary protein and flavor mix. In my opinion, all of the KC 2.0 flavors are better tasting than the 1.9 versions they are replacing and some flavors are new (Salted Caramel, Banana, Mocha).
- The packaging is different, as is the packaging process. KC 2.0 is being manufactured at industrial scale instead of in small batches (again, because of the off the shelf protein powder).
- KC 2.0 has fewer net carbohydrates.
- KC 2.0 has a better nutrition profile with higher levels of potassium.