Out of the 2 id go with the first u should also make sure u get at least 1 gig ram and i suggest 160 gig HD.

I would suggest trying to decide what your daughter will be using the computer for before you go out and buy something. If its for college and you expect her to be carrying it around pretty often, go for a smaller size. If she will be using it for lots of her music and pictures, make sure that the hard drive is as large as possible. 1.6 GHz CPU should be fine for the computer unless both vista and heavily taxing programs such as high end games or CAD programs are going to be used. This also goes for RAM. 1GHz is plenty for your average user and unless very demanding programs will be run, it should be fine. Try and find a well balanced system that takes all this stuff into account. If you don't want any chance of system instability or viruses, go for an apple. Your daughter will pretty much have to break the thing in half to not be able to use it. I do a lot of school work on mine including computer aided design (CAD), and heavy math calculations, as well as running games on top settings. I've got about 2GHz of RAM, 2GHz CPU, 2 internal 120gig hard drives, and more usb ports than I know what to do with. My battery lasts for about an hour unplugged and it weighs a ton, but its what I need.

I would suggest you visit these two web sites and call the 800# and talk to the tech on them, explain what your daughter will be using laptop for now and the future. Also these web sites still offer XP for laptops and I suggest you stay with it as you will probably be happier, make sure you also purchase a coolmat/chillmat depending on what they call them to go with laptop, this will extend the life of laptop for a long time, they can be bought at Wal-Mart, Staples, Sam's club etc. here are a few examples Toshiba Satellite Pro A200-EZ2205X Notebook PC - Intel Core 2 Duo T5470 1.60GHz, 802.11a/b/g Wireless, 1GB DDR2, 160GB HDD, Dual Layer DVD RW, 15.4" WXGA, Windows XP Professional Systemax Pursuit 4162 Notebook PC - Intel Core 2 Duo T5550 1.83GHz, Genuine Windows® XP Professional, 802.11a/g/n Wireless, 2GB DDR2, 120GB HDD, DVDRW, 15.4" WXGA Lenovo 3000 N200 Laptop Computer - Intel Pentium Dual-Core T2330 1.60GHz, 802.11b/g Wireless, 1GB DDR2, 120GB HDD, DVDRW, 15.4" WXGA, Fingerprint Reader, Windows XP Professional

2 x 533 = 1066 1.4 x 800 = 1120 pretty close, but an extra MB of Cache can really make a difference. All other things being equal I'd rather have the 800 Front side bus with the 2MB cache.

Gaming and graphics (art,photo's etc)go with the 2GHz 800FSB. Internet, school work the lessor will do but remember the technology is always being upgraded and the weaker the PC the faster it becomes obsolete. BTW get a HD 100g plus if you can.

bus speed and cache size make a SERIOUS difference so the 1.4 gig wins this hands down.

The latter. The bigger L2 cache and MUCH faster FSB offsets the slower processor. Also, the 800 MHz FSB makes it more "future-proof"; easier to upgrade in the future.

what you really need to find out is the architecture it will be expressed in nanometers (nm) if the slower cpu in ghz is 45nm and the faster cpu is 65 nm or higher the system with the slower clock speed in ghz (1.4 here) will be faster for the system on a whole picture a 2 liter soda bottle the big part is the core(the2.0ghz) and the neck is the data pathway the core is fast but it can't execute the data stream very fast, now picture a flower pot the smaller closed end is a slower 45nm cpu the clock speed in slower but the data pathway is endless