The chest is more thin-skinned than other areas. If you aren't prone to keloid scarring then most likely this would not occur there either, but it may not be quite as clean as the other areas simply because there is thinner skin there and it's a bit harder to hide the removal spot. Overall, a tiny mark would look much better than the large dark brown spot there though. A shave excision is most likely what I would do, but it's hard to say that exactly without an in-person exam. Make sure you follow good postcare!
"This answer has been solicited without seeing this patient and
cannot be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."