I apologize for my Spanish, I am from Maine.
(Eso pretende ser una broma ya que su Inglés es probablemente mejor que mi español.)
I don't have any more information on the 315 than is available at Taylor's website but I do have my opinions.
The 315 is a very good value. It is especially well-suited for players with an aggressive technique. Though designed for medium gauge strings, some guitarists have gotten good results with light gauge strings (0.012 inches). Switching to light gauge strings will result in a slightly lower maximum volume, perhaps slightly more sustain, and a modest change in tonal color. Guitarists with a light style of playing, especially those who use their fingers instead of a plectrum, will probably benefit from using light gauge strings.
I had a similar Taylor guitar that but for the cutaway is similar to the 315 , the LKSM-6. It is a jumbo made of solid mahogany and solid spruce. I play without a plectrum and with very short nails so I found the medium gauge strings a bit difficult and asked an excellent guitar technician to set the guitar up for light gauge strings. He convinced me to let him improve the action of the guitar rather than string it with light gauge strings. I'm glad I listened to him. After he had adjusted the guitar by first filing the frets to a tighter tolerance, it was as easy to play as many guitars with light gauge strings plus I liked the meatier sound of medium gauge strings for single-note solos.