I mean you’d do comp sci instead of maths lol
as someone doing comp sci/maths majors, I can prob give some insight though.
the overlap between comp sci and maths subjects is very very small usually just a first year subject if anything but there is definitely some overlap in skill sets, like comp sci uses a lot of discrete maths, but it does also have a lot ofjust coding
it’s a lot of personal preference between comp sci and maths, personally I’ve honestly enjoyed comp sci more so far but there are some people who prefer maths and I’ve still found maths super interesting as well.
the other consideration would be the job opportunities out of each because from what I’ve heard a lot of people end up not really enjoying actuarial. the comp sci market is pretty cooked atm, it’s possible to get a job but much tougher than it used to be. maths is surprisingly decent for employability as long as you keep a good wam and are good at problem solving because there’s a lot of finance options both with quant and in more traditional finance BUT with actuarial this isn’t really any extra options since you’d have most of the same stuff off pure actuarial so that’s worth keeping in mind.