I am considering to buy a laptop very soon and i have two possible candidates, but i dunno which one i should get...

First of all, just some basic questions:

1. is Centrino A LOT better than a non-Centrino in terms of battery life?

2. is Pentium M better than Pentium 4 M?

Okay here are the two models:

Sony Vaio V505: 1730$

Intel Centrino Pentium M 1.4Ghz
512 MB Ram, 266
40 GB HD
24X DVD/CDRW
12.1" screen
802.11B
Radeon 32MB
4.4 lbs/1.3" thick

Dell Inspiron 300 M: 1650 $ w/ extra 5 hr battery

Intel Pentium M 1.2 Ghz
384 MB RAM 266
30GB HD
24X DVD/CDRW
802.11B
Intel Integrated 64MB
2.9lbs/1" thick

the websites are http://www.sonystyle.com/is-bin/INTE...FA2NB&Dept=cpu

and http://www1.us.dell.com/content/prod...=19&l=en&s=dhs

So can someone gimme some advice Thanks