• Aces over Europe

• Crash: Mind over Mutant

• Secret Weapons over Normandy

And the serial field is written exactly as-is only on the disc itself.  You can't expect a dumper to always have the cover, but they'll definitely have the disc if they have something to submit.  The spine serial, if it is different, can be added to the comments, however.
Asian Sony discs almost never have the hyphen, and European Sony discs almost always have it.  Don't have much experience with North American Sony discs personally to know which one is more commonly printed.
(Some minor exceptions also exist, mostly with development discs that don't have any serial printed, so the internal serial is sometimes used instead etc. etc., even though this would be technically against the guidelines.)

So, I'm just very curious how we determine whether a game has a hyphen in it's serial or not?

I spotted a spelling error in http://redump.org/discs/system/ps3/sort … letter/h/.
In Heroes over Europe, the "O" in "over" should be capitalized.
I'm sure this was a simple oversight.

Question:
I notice that a very small % of PS3 serials do not have a hyphen (-) in them.
One such games is God of War Collection, Serial BCUS 98229, http://redump.org/disc/40150/

I am wondering if this is deliberate? And if so how does this occur?
Like, how does one distinguish between a game serial that has a hyphen and one that doesn't?

I will keep an eye out for responses.
Thanks!