Which is better... Sleep or shutdown?

Which is better for your computer... sleep or shutdown?
Thanks

Technically, it doesn´t matter much if you shut your computer down or just put it to sleep., i.e. nothing is more detrimental to your computer´s "well-being" than the other, respectively.
I´m not sure about the Sleep Mode with the iMac, but I believe it´s a suspend-to-ram, right?
That would mean any unsaved data isn´t saved and could get lost if the computer fails to wake up from sleep.
That could be a point against making the computer sleep.
When it´s sleeping, the computer will also consume a steady, albeit very low quantity of electrical power. From an energy-saving standpoint, that could also be counted as a negative aspect.
MacBooks and MBPs use suspend-to-disk as sleep mode, which means the contents of the ram is saved onto the hard drive and then the computer is fully turned off. Takes a bit longer than suspend-to-ram.
I always put my computers to sleep... both my iBook G3 and my Win laptop.
My win laptop will automatically enter suspend-to-disk after 2 hours if it isn´t used again by then.
hth
ibook g3, acer travelmate w/ pentium m 725   Mac OS X (10.3.9)  

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