ORIGINAL: JonD
The more obvious disadvantage of SF2s is the fact that unless they're acquired from the person/company who actually made them (and offer full license for their use), you're in murky legal waters at best when downloading "free" SF2s as you have no idea of their true origins.
This isn't an issue with Dim Pro sounds. 
the same can be said for ANY sample based thing.. regardless if it's sf2 / sfz / kontakt etc..
if you look at some license agreements (even commerical ones), the basic version is.. "if you get your a** sued and it's an iffy sample.. nothing to do with us, your liability" . A certain company has that disclaimer, and if they aren't sure about their material sources then that is very worrying.. The classic one though is the amen break.. used on COUNTLESS sample cd's.. and yep technically it's copyright (although Mr Cooper RIP never chased anyone for it to his credit) . Although the sample cd companies charged for it, they should have given him a very small fee since they were saying it's their own work.
the most obvious thing i can think of .. hmm sound fonts , 1 file. sfz.. map file + samples.. sfz supports OGG format.. also easier for multi-velocity sounds..i.e. a piano, where you can have loads of samples.
to edit SF2, I use to use Vienna (which is free), but to use that you have to have Creative sound card on board with the newer versions of it.
there are plenty more differences, but it would take hhm 10 minutes to type it I guess.
sfz was an improvement on the sf2 format with more functionality is the short version (unless they improved SF2 since I last used it years ago)
post edited by Fog - 2008/11/17 21:58:33