Waffle slab sits on top of the ground (possibly on piers/footings if needed) traditional slab is in the ground (possibly on piers/footings if needed).
Both as good as the builder and the engineer who built them and the consumer that maintains them.
Don't make a competition out of these types of slabs , that is stupid because all evidence - good and bad - is anecdotal. I have never seen a scientific study on which slab is better.
Basically, don't be a nit wit.