Business class is best appreciated on a 14 hour overnight flight. A nice dinner, few drinks and a good nights sleep lying down in a spacious quiet cabin, vs trying to sleep upright crammed in like sardines in economy with crying babies and noisy children.
On a two hour flight it's hardly worth the extra. The seat may be a bit nicer but it's unlikely to be lie flat on a narrow body aircraft, you may not be flying during meal times and will only get a small snack. I can suffer a couple of hours quite easily with my IPAD and a good book. Join one of the lounge programs such as Priority Pass (not well represented in Australia at the moment), so you can have something to eat and drink just before boarding and you'll hardly notice the difference.