Setting aside contract considerations, purely as a player who would you rather have - Bryant or Rendon?
Rendon, he's the better hitter and they both now have had significant injury issues.
Padres' might have interest in him, their Farm is also stocked with high ceiling players. He would slot into their OF and likely be a + LF.
Padres' showed last year they are going all in, they pushed tatis/paddack and signed Manny. Getting a semi cost controlled star like Bryant, who has significant play-off experience, would be an excellent short term move to take the next step. ? is would the cubs be willing to accept a package of guys that are a bit further away.