Answers to my recent question How hard does atmospheric drag push on the ISS? Is it more than one pound? and the 2015 question What is the ISS drag? both provide numbers for the drag force that the ISS experiences.
The answer on the new question is more thorough and has unique value as it shows the orbital mechanics and mathematics necessary to obtain the answer and a clear and readable way.
The answer on the old question has unique value as it shows the rate of descent 10x faster, during late 2014, a particularly high period of solar activity.
Close voting on the new question as duplicate of the old started after the excellent answer to it was posted. This is the common and reflexive but not at all required direction for close voting.
There's no requirement that new be closed as duplicate of old. We are not required to always point backwards. We should instead point to the best answers for the benefit of future readers.
However I feel that we will do better by future readers by guiding them to the newer answer which shows better how the answer is obtained.
But there is a third option, to merge these two nearly identical questions so that readers can have the best of both worlds; both the equations behind the calculation and the opportunity to see the dramatic change in altitude loss rate of the ISS between a quiet and active Sun.
I may be biased, but I feel my question is the better of the two, but that's of secondary consideration.
Can we give future readers the best benefit by merging these two questions?
Text from my flag on the newer question:
I think this and the proposed duplicate are nearly the same and ripe for merging. This answer has unique value because of the careful explanation of the mathematics, and the other answer has unique value because it highlights a far higher rate of altitude loss during the last solar maximum. It would be a disservice to steer readers away from either answer.