Maybe the best answer though I prefer smooth...
Smooth is fine for shooting because ivory has a natural 'grip' to it. I have two smooth - both for shooting - and a checkered for show.Smooth for looks, checkered for anything other than an occasional shoot.
That's correct - and the smooth can be easily buffed.If a checkered set of ivory got bumped and chipped, knocking some of the checkering off or damaging same, you'd really be bummed. It is less easy to goof up a smooth set.