Eh, I've got both. The '13 is OK, but it ain't a helluva lot better than the '12 if any at all. And, the gloss black deck panel is a finger print magnet.
2012 base GT, Grabber Blue/6MT/Brembos/3.73
2013 301A GT, Gotta Have It Green/6MT/3.31
1983 GT, Bright Red/5MT/T-Tops/3.08