In Goblet of Fire, when Harry dreams about Voldemort, it's always in the third-person. For the first dream, when Frank Bryce is being murdered, the text makes it clear that Harry is not dreaming from Voldemort's perspective.
He closed his eyes tightly and tried to remember what Voldemort had looked like, but it was impossible...All Harry knew was that at the moment when Voldemort's chair had swung around, and he, Harry, had seen what was sitting in it, he had felt a spasm of horror, which had awoken him...or had that been the pain in his scar? (GoF, "The Scar")
Later he has a second dream. Again, Harry sees the dream in third-person perspective, from behind Voldemort's chair:
"Harry - did you see Voldemort?"
"No," said Harry. "Just the back of his chair. But - there wouldn't have been anything to see, would there? I mean, he hasn't got a body, has he? But...but then how could he have held the wand?" Harry said slowly. (GoF, "The Pensieve")
However, every other time in the series, Harry dreams of Voldemort from Voldemort's perspective, or the perspective of whoever he's possessing. The only other time he sees Voldemort is when he looks in a mirror.
So what gives? Are Harry's Goblet of Fire dreams different than his other dreams in some important way?