Buenas,
No lo tengo, pero buscando un poco en Google he encontrado estos comentarios en el foro de DrummerWorld:
"The main difference, besides the color and clip, is the Gig version is a stripped down version offering only the lug pitch function (Absolute pitch), the Difference function, and reading fundamental pitch. It does not have the Filter button/option or ability to save your pitch readings into memory."
"I was wondering the difference myself, so I got in touch with OverTone Labs on Twitter and asked them. Have posted the reply below, hope it helps:
Here are the main differences:
The Gig does not have saving or recalling ability.
The gig displays frequency and note simultaneously, the tune-bot switches between frequency and note by pressing the note button
The gig combines Filter and Difference mode/ when you press the difference mode, it also Filters to that pitch. With the tune-bot (original) you can Filter without using difference (or vice versa) and you can use both modes at the same time.
the other differences are just design and the clip."
Espero que te ayude. Lo que más critican es que no tenga la función de filtro, porque al parecer le cuesta algo conseguir lecturas correctas en tonos altos (como la reso de la caja).