Pokemon diamond and pearl (both for Europe) are uploadet 2 times on this site with other release ID´s! (diamond: 1243, 1284 | pearl: 1242, 1286) I would ask where is the different between the versions? Are the later releases patched?
Those IDs are both European region releases, there are a lot of countries in Europe and sometimes games are released in several versions one containing for example English, Danish, Swedish, Dutch and the other Italian, Spanish, French, German. Both are labeled as being released in Europe but they contain different languages.
Sure, go & download them, then see for yourself OK, that sucks, then why not go to these sites to check for information regarding ROMs: http://gbatemp.net/newgon/?dat=gba <- gbatemp http://releases.pocketheaven.com/ <- pocketheaven release lists http://www.gamefaqs.com/systems.html <- gamefaqs
Usually, Pokemon games only have one language available, so, probably, they're the same upload but from different sources (notice that one says sUppLeX and the other says iND). Other than that, I can't remember. When that happens, the letter from the specific country appears, instead of an E (F - France, S - Spain, G - Germany, etc.) Gosh, i'm opposing the uploader.
I downloaded both and testet them with ideas! They are both multilingual but with different europe languages! Would be nice, if romulation can mark it!