Well, this is no longer true. The 600MHz iBook has a 100MHz bus. The
500MHz model has a 66MHz bus. Both the iBook and the newest TiBook have a
256KB cache on the chip.
Another difference that nobody is mentioning is the TiBook has a PCMCIA
slot where the iBook has none. I use mine for better wireless ethernet
(that lucent/airport rig sucks) and to attach SCSI peripherals. With the
iBook I guess you would have to resort to an IEEE-1394 <-> SCSI bridge?
The TiBook has gigabit ethernet and the iBook has 10/100. This probably
doesn't matter to anyone but there it is.
Apple have just introduced a new 667 MHz TiBook with 16 MB Radeon
graphics. This should be considerably zippier than the previous model.
I hope I have covered all the differences between these two laptops :)
-jwb