They can have many similarities in some cases, especially in the south of Chiapas that in on the border with Guatemala. In this case, you can stand in Chiapas and see the region of Cuilco, Huehuetenango just across the valley. Clearly the tree doesn't have a nationality so it's actually strange that coffee farms within sight of each other can be sold as being from different places, one a Mexico Chiapas and one a Guatemala Cuilco !