After googling A LOT, info I got is that ISOTools makes a 3K3Y iso that have D1, D2, PIC inside iso. D1, D2, PIC is info that PS3 creates when playing real retail game on real console(interaction). A redump iso is an encrypted iso with no D1, D2, PIC in iso. 3K3Y iso has D1, D2, PIC inside so it can emulate a real iso on a PS3. If you want to match redump, the D1, D2, PIC needs to be removed with the PPF patch. Also encrypted AND decrypted iso's created by ISOTools (In Options), use whatever works for you because so many ways to screw up or get lost. It's just trial & error.
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