Popular Gray has a greige base with a good balance between beige and gray, but some pink and purple undertones can show up to the party more often than some people would prefer.
These two both have a good balance of gray and beige.
What sets Popular Gray apart (and makes it less popular, in my opinion) is the more challenging undertones.
Is Sherwin Williams Popular Gray the right color for you? Remember, you need to sample the shade on your own wall before committing to an entire gallon.