What are the differences between C208 versions? I am aware of a few versions of C208:  


C208 Caravan   
C208 Grand Caravan    
C208 Grand Caravan Amphibian


Amphibian has pantoons with retractable landing gears, but what is the difference between C208 Caravan and C208 Grand Caravan? Is it just the cargo compartment in the belly? Are there other versions of C208? What are the differences between them?
The civilian variants can be summed up in this table I made based on Wikipedia:



What to take out of this, is the different fuselage lengths, and that the amphibian comes in two fuselage lengths.

The belly-mounted cargo-hold is optional.

There are also military variants, even one that shoots missiles (an incentive to check out the Wikipedia page).