[Tutor] Too different 2.6 vs 2.7?

[Jorge Biquez]

Hello all.
Newbie question.

Are there really BIG differences between version 2.6 and 2.7?

Under my ubuntu configuration I can not install version 2.7, 
searching the why, but the version 2.6 is maintained and installed by 
the ubuntu software center.....

As a newby , trying to learn all the features of all the libraries. 
Will I miss TOO much if I stay under version 2.6? Or it will be 
better to stay under 2.7 (in that case under Windows XP)

Thanks in advance for your comments.

Jorge Biquez