Buffalo or Blue Grama Grass

The picture below is of the grass that was predominantly growing on the property until the massive drought last year.  I'd like to buy some of the same type grass seed to get grass growing in some areas where I disturbed the soil.  I used a cell phone app to find out what type of grass this is and the app indicated it was Blue Grama.  As I researched more, I found that Blue Grama and Buffalograss look very similar except for their growth habits.  Blue Grama grows in clusters where Buffalograss grows more as tuff.  This means I'll be ordering a little Buffalograss seed when the spring arrives.