when building the lists me and AK-47 (who put together PAL and NTSC-US) sets went through the database and removed every serial from the list that is present on the database including entries that list multple serials (because the data is the same).
@themabus, i believe the PAL and NTSC-U lists are serial specific as well, a different user made them but i'm under the impression he did them based on serials.
this list is obviously more geared to collectors who are trying to hunt down games to complete the redump set for the purposes of a full, verified set.
many of the reprint games with diff serials will have the same data/version #, but this way we can make sure we have at least one of every serial in case they are different versions.
definitely not perfect lists, we knew these obstacles when we started making them.
@themabus: when the number of titles shrink on the list i hope to do a better list with more details. but right now thats not an option.