Looks like there will be three distinct models, with each one coming in two different color options.
Sync by 50: The most expensive pair ($400). They offer wireless connectivity with the included dongle, passive noise cancellation, a hard-shell case, and the option of black or white. Ships in 2-4 weeks from date order is placed.
Street by 50 (On-ear): Slightly more affordable ($300). This version is quite sturdy, has a tangle-free cord, and the option of black or blue. Ships in 2-4 weeks from date order is placed.
Street by 50 (In-ear): The cheapest set ($130). Not available for preorder yet, but are slotted for an early 2012 release. Includes a cable with an Apple compatible mic with volume control, carrying case, and available in black or white.
The company is also offering free shipping for orders over $100 till 5th January, 2012.