usurp: You say they're "similar." Others see an undeniable and significant difference. I guess we're arguing over semantics then, like so many times in the past.
What's intersting is that to you the iBook and PowerBook were
similar enough for you to choose the less expensive iBook. For your brother, on the other hand, it appears that they were
different enough for him to choose the PowerBook. It all depends on your needs and point of view.
Escher