That said, both Swords to Plowshares and Dispatch are more than playable, and I think which you pick first will depend largely on what your deck is trying to do
Thanks to the wording on a card, despite Caribou probably better-served being folded into the creature type 'Deer' or something, WOTC needs to list Caribou among their creature list
Can you lie low enough to create a position to win from
Gettin Mama Odie, Mystical Maven out there early - which should be doable thanks to the cheap cost of the card - alongside a handful of songs, will very quickly put you into a position wherein you can play a lot more cards per turn or a much more expensive, and more powerful, card a lot earlier than your opponent
It is a slow and not even very mana efficient to make bodies and equally as slow to sacrifice them
An opponent chooses one of those piles