I use this joomla template 2.5 "TEMPLATE 002036" for free.

If I buy this for 24 $, will it be suitable for the one I use before. The one I use is joomla template 2.5, and the one I want to purchaes is joomla template 3.0. I'm not sure if it is suitable or not. And I also wonder if this template has a mobile version or not.

What's the difference between the one for 29$ and the one 39$?

Thanks a lot.