Hyper Rare cards aren't typically valued highly, though Obsidian Flames' relatively low card values make space for this unusual inclusion
Matte sleeves often provide a better grip, making them easier to shuffle and handle compared to glossy sleeves
(Their flavor texts go beyond remarkably similar into suspiciously territory.) While the Samite Archer presumably started as a Samite Healer and shifted to sniper mode, the DAvenant Healer comes from a tradition of DAvenant Archers and has added some kind of funky incense healing to the repertoire
Finally, consider the price
For as long as they stay in play, all you need is a sac outlet like Woe Strider to send the cat to the graveyard, which will sacrifice the Food token, drain your opponent when it enters the battlefield, and create a Food token with the little halfling ability