@JonC850620
I just started taking my SS at age 70. My situation is similar to the details you have described, similar salary, similar SS benefit, similar age. Deciding whether to take your SS benefit now or later, or anytime between now and age 70, may depend more on other factors in your life that weren't mentioned.
I have seen a lot of discussions about the pro's and con's of taking SS at FRA versus waiting a few years. And I have seen the argument that one could take benefits at FRA and invest the entire amount through age 70; people make this analysis and then compare the financial value that each approach might provide. Of course, the future of the investment world is unknowable and putting that stream of cash into the market might be a catastrophe. Or it might be the Golden Goose. And people often don't act as they think they would when the markets crash.
The fact that you are still working beyond your FRA doesn't seem to affect the analysis much. You will however possibly get higher benefits if the next few years will count as some of your "highest 35 years" of earnings for SS benefits (note that those earnings are factored for cost of living in their analysis). Even so the choice of whether to take now or later is likely unaffected by your continued working.
There is the intangible point that the SS Trust Fund will be depleted in the near-ish future. This doesn't mean that SS will be kaput but it is possible that benefits may be decreased in the future, at least for some people (based on age, I presume). Again, really hard to base a decision on such uncertainty. Though I myself in my planning and spreadsheets account for such a reduction in the future. Some people may think "better take it now!". Or an analytical person might crunch the numbers on taking now versus later, also accounting for the possible reduction.
I was enamored of taking SS at FRA and stashing the cash until a later age. But I realized the insurance aspects of the SS benefit: I had my wife to consider (some people our age may even have young children at home to consider as well). Since my wife is considerably younger than me I elected to delay SS until age 70, so as to maximize her possible survivor benefits. Based on some analyses I did years ago I even decided to extend my term life insurance so that it expires around the time that wife will be 62 and begin taking SS benefits (of course, if I die before then she can take survivor benefits as early as age 60). I was most comfortable with this approach, delaying SS until I was 70, to assure that she would be taken care of in my demise. As implied, my analysis of years back showed me that the risk to her was my "early demise", in which case she would have a cash crunch, rather than me living to a ripe old age and spending all of her inheritance.
For your decision you'll have to consider if you will leave any survivors who would depend on your SS and other assets. If no one is in this position then it is likely immaterial whether you elect now at FRA or wait. I think the inflation-adjusted cash flow, transformed into a net present value, would differ very little.