To be fair, '99 abruptly cuts off at the last 3rd of Yorknew, so to finish the arc at all you have to track down a set of OVAs that are likely to have wildly different translation, and I believe '99 was licensed at some point but the conclusive Yorknew OVAs were not. So unless you sought out a separate fansub of the first OVAs, there may be a chance you didn't even see the whole arc.
Either way, the first OVAs which finishes Yorknew is pretty great. Yorknew in general is for whichever version.
I dunno, Greed Island OVAs aren't terrible or anything, they're probably the worst part of '99 though. Especially during the first batch they feel like the production value plummeted and an unfinished/unpolished product was released. It gets better as it goes, but those OVAs are kinda hard to judge.