The Siri virtual assistant and Lumia's voice-controlled search function each reportedly complement each other as the 'best smartphone ever'. Assuming Siri's results are coming (as they appear) from Wolfram, those results are subject to change. Of course, the next time the Lumia is updated, it's likely to have a new "feature" inserted by Microsoft's marketing department to control bad spin.
But for now, it's a battle of complements. You first. Oh, please; after you. No, I insist, really.
Gotta love it.