I wouldn't make a decision solely based on food issues.
The key thing is what most 1st year students at that particular Uni are doing. If most are in catered halls on a campus, where the social life revolves around hall bars and parties, then being in a self catered flat off campus, makes you a bit isolated.
Definitely look at the ratio of 1st years in catered and self catered at that particular Uni.
A catered hall means they will meet loads of people and although they may not be best mates with everyone, they will have many options of who becomes their closer friends. Self catered can mean a group of 6 or 8 and it might not be that easy to meet others.
Consider where the accommodation is - which types of accom are closer to the centre or where most stuff goes on.
If everything is equal and balanced, then being in catered can be good in terms of meaning cooking and bills are one less thing to worry about. Most catered halls will still have little kitchens with a kettle and baby belling, so cooking the odd easy meal is still poss and of course people in catered halls often have kettles and toasters in their rooms.
Unis which are collegiate are often fully catered, at least for 1 or 2 years. If a non-collegiate Uni has a similar Halls based social life (often on campus Unis) then it is good to be at the heart of it for a year. Many will move out in their 2nd year, with friends (rather than being placed with strangers, which is what happens if you are a 1st year) so there is plenty of time for the learning to cook and manage a house together thing.