X220T
April-17-11
6:00 PM
Looses: 
Lousy screen resolution and screen shape. (71% the pixels and 95% the area)
Possibly a smaller disk.
Wins:
Memory more than doubled.
Processor speed doubled.
Better OS.
Battery life doubled.
Touch screen.
Integrated webcam.
Integrated touch pad.
Better wireless.
Cell/GPS integration.
One "always on" USB.
In[1]:= 1366*768 / (1050*1400) // N
Out[1]= 0.713665
In[2]:= (12.5^2*9*16)/(9^2 + 16^2) / ((12.1^2*3*4) / (3^2 + 4^2))
Out[2]= 0.950037