<p>The 13-inch Macbook pro has a battery life of up to 10hrs and has Core 2 Duo.
The 15-inch Macbook pro has a bettery life of up to 8-9hrs and has Core i5.
If money isn’t a problem, the 15-inch seems like the better choice, it has a very good battery life, has a faster processor than the 13-inch, and has a bigger hard drive.</p>