should i even give STAT

i got into oxford, and edinburgh (unconditional) and edinburgh is arguably better for computer science as compared to UCL (source: my counsellor) so is it worth sitting the STAT and paying like 100+ pounds for it??
p.s. i won't prepare for it anyways like i did with MAT and everything because my curriculum is rigorous enough and I have like my main exams starting from 21st Feb (and I need to fulfil my oxford conditions pleaseee) :<