I’ve compiled a list based on my research, noting major differences. Hope Its helpful to everyone. I site everymac.com and Wikipedia as my main sources. Hope the forum allows corrections(i’m sure i have a couple), let me know if you find any.
A1136 EMC2065 - 5th Gen ~plastic front and metal back
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MA002LL,30GB,White
MA146LL,30GB,Black
MA003LL,60GB,W
MA147LL,60GB,B
MA452LL,30GB,U2 edition
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A1136 EMC2065 - 5th Gen Enhanced
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MA444LL,30GB,W
MA446LL,30GB,B
MA448LL,60GB,W
MA450LL,60GB,B
MA664LL,30GB,U2 edition
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A1238 EMC2173 - 6th Gen “Classic” ~metal front and back, first “Classic”
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MB029LL,80GB,Silver
MB147LL,80GB,B
MB145LL,160GB,S ~unique “FAT” HDD , cable, back, and battery.
MB150LL,160GB,B ~unique “FAT” HDD, cable, back, and battery.
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A1238 EMC2173 - 6th Gen 2nd Revision(aka commonly as the 7th Gen) “Classic”
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MB562LL,120GB,S
MB565LL,120GB,B
MB293LL,160GB,S
MB297LL,160GB,B