The differences between a vape pen kit and vape pod kit are minimal; it is predominantly down to the fact a vape pen kit uses a tank or clearomiser whereas a pod kit uses a pod instead.
A vape pen kit usually consists of a battery also known as a device, a tank or clearomiser and a coil.
A refillable vape pod kit, similarly to a vape pen kit, is comprised of a device, a pod and a coil. This pod can be refilled numerous times until the coil inside begins to taste burnt.
A prefilled vape pod kit is comprised of a device and a pod which is prefilled with e-liquid. These pods are not designed to be refilled and are designed to be disposed of once empty.