I've held both and between the two perfer the 930 Kulgera. Being an Osborne fan it was a logical choice for me, even though I played with a 480 at my local dealer's shop and think it's a nice little gentleman's knife, just not my style.
A number of us on the BM forum did a 930 passaround, which is still ongoing, so I got to play with it for a week. On the pluses, I love the black and blue sculpted G-10 and nickel plated hardware. The thumbstuds, backspacers, and Axis studs all match each other nicely, and I had no problem opening and closing the knife. It flicks well and much like the 940 series, the blade is larger and longer then you'd think.
The only thing I really don't like on the 930 is how the plated liners extend out on the bottom of the knife, so when it's gripped tightly, the liners dig into the palm. It's not bad, but for me it's a negative, about the only one, too.
So, 930's my vote.