Hello! Our Carbon Steel Edition is the culmination of improvements made to the band combined with a premium look, feel and fit. Both bands will get updated with new features as our system and approach allows us to continually upgrade your experience.
Side note: One of the improvements to the 2014 Carbon Steel Edition is to make the straps suitable for various wrist sizes. We've had quite a bit of feedback from customers with small wrists praising the Carbon Steel Edition.
Hi Melissa, Basis is a great choice for a first time health tracker! With four advanced sensors, Basis tracks steps, activity (walking, running and biking), and sleep automatically so you don't need to remember to push any start or stop buttons. With Advanced Sleep Analysis, the band detects REM sleep, deep sleep and light sleep as well as tosses/turns and interruptions - all from your wrist.
For more information, these articles might be helpful:
Detailed explanation of heart rate tracking - http: //ow.ly /vRyUI
Comparison of Sleep Trackers - http: //ow.ly /vRBq9
Detailed explanation of Activity Tracking - http: //ow.ly /vRC0c
Let us know if you have any specific questions about the Basis bands and we'd be happy to answer them for you. Hope this helps!