Thick incision scar after breast aug. Will it fade? (Photo)

You are correct that deep stitches most likely pulled more skin towards the incision to take pressure off the scar.This is a common occurrence but usually occurs on both sides.The surgeon may simply have placed more tissue in the sutures on this side.However this early after breast augmentation this plumping or protruding of the scar almost always becomes smooth by 4-6 weeks.See your plastic surgeon and ask if massages permitted as in my experience this usually helps a great deal.

Hi there. It is a little surprising that one scar us different to the other. Is this revision surgery? Mostly scars settle down by themselves with time (and it's likely that yours will) though at Body Recon 

I would not be concerned at this early stage. Scars take at least 6 months to mature so it is too early to predict its final outcome. I suggest you speak to your PS regarding scar management to get the best result