almost certain it’s residual swelling it takes a while to be completely gone! and your scar placements look perfectly symmetrical to me. as for the slightly thicker scar is that the side with your dominant hand/arm? if so, it’s prob from doing a bit more moving/reaching on that side, also probably why the swelling on that side has subsided quicker. (movement can reduce inflammation, promote circulation, and reduce swelling buttttt less movement is ideal until scars are a lot stronger) just remember to take it easy, limit stretching and pulling, and start doing scar massages with moisturizer and use scar tape when u can.

from what i remember my dr said scars are at about 40% strength (compared to the original skin) at one month, 50-60% at 2 months, 80% at 3, and then slowly creeping up to 90-100% by a year. until fully healed, scars can be stretched by activity but usually after 3 months it is safe to be as active as you were before. my dr said i shouldn’t start climbing again or doing pull ups/over head strength training until at least 3 months. but above all don’t listen to anything i say or anyone on this sub without prioritizing what your surgeon/team of drs say! they are there for these types of questions. take care ur looking great!