I have both and consider they are very different. I'd wear them according to what I'm matching them with, the occasion, or even my mood. I have small seed pearls, larger pearl, black pearl studs and one pair of larger diamond studs.
The peal ones for me are more casual, I guess because of the price but I wear my diamond studs regularly too. I've never had a problem with the pearls being delicate, I've had mine for some years and they look great. If you're careful about spraying perfume and take a bit of care over them I don't see any issues.
If you can't get both, I'd just consider which would suit you best and what you'd wear them with although really anything goes and they both look great.