We print all our pictures ( 2x3, 4x6, 5x7, 8x10, 11x14 ) on true photographic paper developed in photo chemicals and not on computer printers. 
The difference ?  
Real photographs are archival which means they will not fade. The paper we print your photos on has a guaranteed no fade life of 100+ years. 
The bottom line is they look and feel much better and last much longer.