Star Trek

I'd have to say Sisko is likely the better cook. As far as we know he has more years of culinary experience. Moreover, even though his background is Creole cuisine, he likely has access to more recipes from other species not known or allied with during Pike's tenure in Starfleet.

On the other hand, Pike seems to recreate and even improve upon foreign dishes quite skillfully. If Pike had the knowledge and access to ingredients available during the DS9 era, it is likely he could masterfully prepare dishes with possibly less effort than Sisko. (Maybe?)

Put them on an episode of Chopped with Neelix and (Sisko's dad, Singing Klingon Chef, [insert culinary challenger here]). I would totally watch it.

Pike loves it, but he has no natural instinct for it and has to compensate by using fancy equipment and techniques. It's performative for him, and it's part of his captain persona - see the pristine apron he makes sure you notice. His food wins for presentation, but is rarely any better than what the mess hall would whip up.

Sisko was born into a family of natural chefs, and he couldn't be bothered with the frooferah of plating and fussy atmospherics. He chops his vegetables big and messy, because he knows exactly how to cook and season them so they disintegrate deliciously when they hit your tongue.

Sisko's restaurant is the place all the locals go and dream about when they leave. Pike's is the pricey tourist restaurant that charges a ton and though everything looks great you leave underwhelmed, thinking you could probably do just as good in your own kitchen.

Do they replicate the ingredients then cook them?

Either would be better than the slop Riker served up and claimed were omelettes.

But I think I'll have to say The Sisko takes it.

Not saying his cooking would be better, but I would likely prefer Sisko's. Cajun food is my favorite type. The combination of French techniques with South American flavors and spices is just the best.