I will be curious to see what they do with Peraza over the winter. He will likely go to the instructional league and if they try to move him to 3B, my guess is that is where they would start the process.
La Stella looks fine at 2B and one can never tell about scouting reports, but the question on La Stella was supposedly his defense. If that is true, my guess is if they have found a place he can play adequately, that is where he will stay.
The big difference La Stella v. Peraza is their respective ceilings. If Peraza is indeed a special player, you have to make room for him and if he can't play 3B, it probably puts a dent in La Stella's Atlanta career prospects. It will all sort itself out (at least I hope it does).