I believe this was all fake. The focus on the phones themselves never last and they lack the important camera shot of both phones actually being worked on at the same time. It could very well be done with actors and the few losses are just there to seem realistic which are also extremely minor losses at that. The contestants also seem way too calm and relaxed in-front of the camera and no doubt at-least a small audience watching.
It also fits right into Microsoft's marketing past. Remember the laptop hunter commercials?
Where they would approach a "stranger" and buy their laptop while also this "stranger"
also always just happens to insult Macbooks.
http/www.youtube.com/watch?v=QKbXgpxmeI4 The contest above really just seems to be a live version of this same marketing.
If it is real then the fact that they did not try to get a shot from the back focusing on the actual
performance of the phones is a complete failure. It would have much more marketing value to actually show both screens at the same time and Microsoft's product win time and time again. I don't believe Microsoft would make such a poor judgement if this contest and results were real.