That looks fine, both are different enough, one person probably thought they could elaborate a bit more, and given the times he may have been forming the answer before or near the time the other one was posted -
Fastest Gun in the West Problem
I wouldn't flag them unless it is directly word for word the same. We should be able to encourage a later answer if it is more detailed, has screens, is better, or better worded, or even stated more simply.
So a simple vote up/down should do the trick on if you think the answer is useful or not.
