Designed around the awkward truth that important decks are made by several people and read by people you cannot see. Pitch handles the collaboration properly, with comments, assigned slides and version history that behave the way they do in a modern document tool, and then tells you what happened after you sent it: who opened the link, how far they got, which slide they lingered on. For a fundraising or sales deck, that last part is the feature.
Its AI generation is present rather than leading, so as a text-to-deck machine it trails Gamma. Choose it when the deck matters enough that several people will argue over it and you want to know how the recipients actually behaved, not when you want a deck conjured in thirty seconds.