According to Engadget, T-Mobile is set to release both the MDA and the SDA. The SDA (based on the HTC Tornado) will cost $299.99 USD and should be released the week of February 13. The MDA (based on the HTC Wizard) is expected to follow the week of February 20 and will cost $399.99 USD.
Check out Engadget’s photos for a great comparison of the two devices.