According to the "Unified Scheme," Variety 2 is a Variety 1 galaxy surrounded by a cloud of diffuse gases like hydrogen and carbon monoxide, and tends to release infrared light.  
The first one discovered has 28% of its light concentrated in its emission lines around hot, gaseous iron.  Variety 1 of this type releases massive quantities of X-rays and UV light, and often vary in brightness.  According to the "Unified Scheme," Variety 2 is a Variety 1 galaxy surrounded by a cloud of diffuse gases like hydrogen and carbon monoxide, and tends to release infrared light.  Generally radio ellipticals or spiral galaxies with central quasars, FTP, what type of galaxy having active nuclei is named for the American astronomer who first called attention to them in 1944?
The first one discovered has 28% of its light concentrated in its emission lines around hot, gaseous iron.  
Seyfert Galaxies