DRV8833: Determine Package by Label?

Part Number:DRV8833

i noticed PWP16 and PW16 have the same physical dimensions. http://www.ti.com/packaging/docs/searchtipackages.tsp?packageName=SO

The difference is that the PWP package has a heatsink pad on the bottom. 

i have a module with the 8833 already installed, so i cannot see the bottom of the chip. 

Is there a way to determine the package type by the label? My chip says:
82K
CV25

thx