iBook compatability 10.3 or 10.4?

Hello,

I have an iBook with the following specifications:

800MHz G3 640 MB RAM 30 GB hard drive OS 10.2.8

I want to upgrade to the newer OS but need advice on if 10.3 or 10.4 is the better option for me. I guess what I'm wondering is if given the specifications of my iBook which one will run faster and more efficiently, if that makes sense

I appreciate any advice or thoughts anyone has
Thanks

i run tiger on my g3 500 w/ 256 ibook

not much difference between 10.3 and 10.4

go big or go home