So today I ran the same route as above with Suunto Race S that still has 2.48.16 software. The result is the following:
Race S (2.48.16): total ascent: 393 ft, with adjusted elevation in Strava: 414 ft
Race (2.50.xx): total ascent: 563 ft, with adjusted elevation in Strava: 426 ft
As you can see Strava numbers are fairly consistent and the previous algorithm that I still have on Race S is a bit conservative, but reasonably close. That is consistent with what I have observed before.
Next, I am going to upgrade Race S to 2.50.28 to see how that change the numbers on the same route. Also I’ve just soaked Race in water to clean the barometer port in case it was dirty. I’ll repeat the test afterwards.