Basic shapes can help create basic designs that look simplistic and professional. Sometimes going back to the basics of design makes the best looking logos.
the change in color can amount to a huge change in overall understand for the brand. the right seems more youthful and true to what it say, but the left seems like it could be a play on words or just irony it stands for such a youthful-noted concept.
Designtorget on Behance - created via http://pinthemall.net