You’re gonna get a response like this across the board..
”Don’t have surgery if you don’t want any scarring”
That’s true, but i also understand your question. I think the best way is through a homogenous extraction pattern which means your extracting evenly throughout the donor without leaving a boarder. I’ve seen many cases where people have visible white dots, while others don’t have much there. With the same punch size used. Depends on your skin tone and how you heal i guess. With your example i think 5k grafts is 5k grafts. Splitting it into two sessions may not have anything to do with the visual outcome in the end.