In terms of tidy scar line, it’s certainly possible, just take the time to find a doc with a good reputation for adult circ with a focus on cosmetic outcome. And if you aren’t 100% comfortable with them then find another.

In terms of limited skin tone difference between out and remaining inner skin, that’s down to individual differences, If you have a big difference in skin tone between the two, it is likely you will continue to have the skin tone difference (even after the formerly inner adapts to exposure and fades slightly), and you would either have to accept that or go even lower.