It would aslo partly depend upon wether these are indoor or outdoor kitties and if they have been neutered/spayed.
Indoor only cats tend to lead much more sedentary lives, and those that have been fixed are also not usually as active.
This means that many foods are too high in protein and energy content, at best they can get fat with the problems that causes, at worst, lifelong excess protein may cause kidney damage.
Added to this, male cats can have a tendency to develop stone which pass into the very narrow urethra and can cause extreme pain and death.
Some brands market some varieties specifically for indoor, or elderly or sedentry cats, and some also include non-allergic stuff (rice being the filling rather than wheaten materials) and others also include cranberry extract which reduces the chances of developing stones and ease conditions similar to gout.
All the main brands will do this, they tend to be very much more expensive than say Go-Cat which contains lots of ash filler, and sometimes switching from this will reduce episodes of vomiting - cats will throw up from time to time anyway but sometimes high ash foods make it much worse.
If they are fluffy cats such as Persians, or Maine Coon types, you might also want to look for something that has a hairball reduction formula - I have never owned such a cat so I can’t really say how effective these are.
Very good stuff will reduce the output at the other end and save you money on litter, and reduce the smell too.
It appears to me that there are three market levels, the cheap stuff full of ash, like Go-cat and the supermarket generic types, then the mid ranges such as Purina, Whiskas, and the high range stuff - which will include special dietry requirement such as Hills, Royal Canin, James Wellbeloved(hypo-allergenic)
If they are on kitten food you do need to get them off it as soon as you can given their age or they will certainly get fat, after that it is a matter of the cat lifestyle, and your wallet, you’ll note that I have not included IAMs here, I find its expensive, not good value and its testing methods are… well lets say things have been alleged.