The ad is pretty clever but like others said, it's not quite fair to compare iPhone with a smaller battery and a more powerful processor to Samsung's larger Galaxy S5.
Most of the reports I saw said the battery life in both is fairly decent.
I can almost guarantee that the iPhone 6's larger battery will out perform the same sized Galaxy.
Lastly, I don't know about "wall-hugging" but my iPhone can charge from empty to near full in less than 15 minutes or something thanks to the new lightning connector, so I imagine most iPhone users who need a charge will be on and off the wall fairly quickly.
I don't know how fast the Galaxy S5 charges up so I can't comment.