IMO a nuc is more fool proof if one can be had at a competitive price. Not only should you get frames of drawn out comb with a nuc, you should also get at least 3 frames of brood. That's THOUSANDS of new baby bees that will be hatching out in less than 21 days. With a package, the already old bees have to build fresh comb, the queen has to lay fertile eggs (hopefully), and then you have to wait at LEAST 21 more days for the first fresh new bees to be born. Those delays and uncertainties add some risk. The other advantage to nucs is you should have good comb as opposed to everything that can go wrong if you start out foundationless.
Truth be told, bees are very flexible, and packages work fine most the time too. I just think the odds of success are a little greater with the nucs if you can justify the cost premium.
If you do go the nuc route, keep a weary eye on our fellow beeks! Some will simply dump a package in a box for a week and sell it as a nuc. If they do that, they have not really earned the premium $ that an established nuc deserves IMO. Also avoid nucs that the beeks put their old junk in; like combs as black as coal!