Best of vs Greatest Hits

There should be a law against a band putting out both a "Best of" and a Greatest Hits CD. Arent these things the same? I dont mind a Greatest hits and maybe a Greatest Hits Volume 2. Where no songs overlap.

But look at the Stray Cats, one of my favorite groups. The "Best of" has 10 songs. 8 of them are also on the "Greatest Hits" I mean WTF? And they get pissed at us for downloading?

And I didnt even bring up The Stray Cats - A Retrospective. Only 2 of the 17 songs on G.H. are not on Retrospective.

And are you freakin ready for this? They also had another Greatest Hits CD come out back in 1992, It shares 5 of its 10 songs with the Best of.

Holy crap on a popsicle stick they also has ANOTHER Best of come out in 1990! And Im seeing all the same song names again with just a couple different.

And how about this. 2005. Runaway Hits: The Very Best of the Stray Cats. The VERY Best. Not just the Best. This is the real good stuff that was actually too good for the Best of. Think Stray Cat Strut and Rock This Town are on there?

And it goes on.
2001, Back to the Alley: Best of the Stray Cats
2004 The Very Best of The Stray Cats
2003 The Best of the Stray Cats
1999 The Best of Stray Cats
Heres one, 1996, Stray Cats, Archive. Song #1, Stray Cat Strut.
1997 Best of the Straycats. I assume this one was a foreign bootleg where they werent sure how to spell the band name
2004 Best of Stray Cats - Ultimate Selection. I assume that this is even better than the Very Best.
2002 Extended Versions. This is neither better nor worse that the Best of, Very Best of or Ultimate, its just extended.
2002 Best of the Stray Cats
1998 The Best of the Stray Cats
2003 3CD Box Set!!!! A box set! Finally all the Stary Cats hits in one Boxed Set! This is what we've been waiting for!
But that just wasnt enough,
2004 Very Best of Stray Cats

When will they be coming out with, The Stray Cats, Every Goddamn Song.