Imported iPhoto pictures show as slightly smaller file size than they did i

I imported my iPhoto library into Aperture (just about all JPEGs). It seems like Aperture reads each file as slightly smaller than iPhoto does -- for instance, 6.7 MB in iPhoto but 6.42 in Aperture. Is this just a function of how each program reads the file, or does the quality of the file become reduced by virtue of being copied into Aperture?

Sharon,
My guess is that it is merely a difference in how the programs show you the size. 1 Kbyte is 1024 bytes, and 1 Mbyte is 1024 KBytes. Some people (even real computer scientists) want to claim that those numbers should be 1000 instead of 1024. Some people claim that a capital letter or a lower case letter changes the meaning of the abbreviation, too.
If your file is 6.42 MBytes (for real), this is 6731857 bytes. If you do the "fake" math, 6731857/1000/1000 is 6.7.
nathan

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