If this picture
shows the T2 I regard it as a big step forward from the T1.
In my opinion the biggest disadvantage of the T1 is the glossy plastic frame, which shows dirt very quick, easily can get scratches, mirrors the sun and feels cheap.
The frame of the T2 looks the opposite.
Annother advantage could be the new button style. The T1 buttons look and feel cheap and unfirm, the colour of the button will get removed over time (same problem as the X50 series reader).