What's the difference between the regular snark sn2 tuner and the snark chromatic guitar tuner. Is there something special about chromatic?
2010 Epiphone Dot
2010 Gibson Les Paul Studio Deluxe
2009 Taylor 110 acoustic
Look up the word "chromatic." Then you'll know the difference, and learn an important musical term.

(In case you're not interested in learning: the original just does a few notes, I think just the open strings on a guitar, and the chromatic does all the notes.)