JJ2 OEM has some fancy stuff and some different stuff, but it is really just the novelty that causes us to want it. Personally I think 1.23\1.24 is better, even though it has some bugs and some strange things. And I don't doubt that 1.00 has its own quirks and bugs that we just haven't found because we don't often play it.

And just something to note: the OEM version isn't illegal to have, unlike the JJ3 demo. If you recieved it legally (like from an actual OEM or on a demo disk or something) there is no problem with owning it. However, just like JJ2, it is illegal to give to people and own if you aren't entitled to.