I quote from my evaluation:

"To clarify, the base unit is the same whether the package is called KVL 8300S or KVL 8320S. The difference lies in the range of accessories. And precisely that CH plug".

The appliance WITHOUT the blender jar has a CH power plug, the one WITH the blender jar has an EU plug. An adapter is then attached to it. This makes the plug a bit clunkier. The price difference has more to do with the daily prices. The CH unit 8300S can also be more expensive than the EU unit 8320S. The CH plug is simply an expensive luxury that you can afford or not. Then you have to buy the blender attachment separately.