I've eaten at both multiple times, and if I had a choice, I'd choose Le Cellier. I like the food slightly better there.
Don't get me wrong, the food at Coral Reef is really good. And we usually eat at both. But a few years ago at CR, we had a bad server, and decided to try some new places for the next few trips.
But the filet at LC is EXCELLENT, and we can't do wothout it.