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I think they are all the same. The full name would be samsung galaxy s3. The others are just people calling it slightly different names but talking about the same device.
Although I like your name better. Even though I know you mean better than every phone except mine![]()
all are the same just referred to by different names 
cheersWhen you boot the phone (AT&T) it shows us "Samsung Galaxy S III" so an abeviation of that should be (in my opinion at least) SGSIII................
Not quite sure where the number 3 comes from.................lol

the S depicts a two-arm spiral galaxy.
