Please could you confirm if the version of the PI in https://www.dexterindustries.com/shop/grovepi-starter-kit-2/ is Model B?
In the product description it says it is the Pi 3. It is referred to as the Pi3, but it's actual technical name is the Raspberry Pi 3 Model B. So yes it is a Model B.
@graykevinb is correct: the kit now ships with a Raspberry Pi 3, Model B.