They will work the same. Netflix is Netflix regardless of where you access it. This Panasonic has every major over-the-top content provider but doesn't have many of the extra channels that the Roku provides. If you are after more that Netflix, Amazon, Hulu Plus, or Vudu then you probably need to go with the Roku.
FYI I steer away from wireless for all of my streaming devices, including my TV, because it's less reliable.