I don't know if the adjectives are going to help much more but... Korina generally has more bite than Mahogany, and mahogany is generally warmer than Korina. Somebody made a youtube vid of their Korina LP vs another guitar and hands down the Korina sounded better. But, I don't remember if it had a Maple top to it, or if the other guitar was a LP.
Sustain? Well, I am not sure you will be able to tell. From what I gather, the stiffness of the neck will make more of a difference, but I am sure the body also has a measurable effect on the sustain. There was a thread on the hardness of the various woods a while back, might be fun to read. I thought that Mahogany and Korina were similar, but I could be wrong going on just memory. And after looking through the showcase, there seems to be quite a variation in weights of the woods in the body. If they are the same type of body I suppose that would be extrapolated into wood density. But it is a natural product, so that is to be expected.
Because I am rambling, no reason to stop now... The way I came across Korina was it was what was (a whole lotta was) used to make the original V's and Explorers. There have been a couple of runs by Gibson of Korina SG's and I suppose a lot of Epiphones with korina, but I never really wanted an Epiphone. So I did what normal people do, got a Tele made out of it.
Patrick