edinburgh or durham computer science??!!?

got offers from both for 2024 entry. which is better and why?

Which will help you get the job you want to get? As for which is better, who knows, but regardless of the university, if you apply for a job that requires a skill you don't have, you won't get the job. So look at the course and what it has to offer and go with the one that is offering more of what interests you.
And where as the "top" universities go to extreme lengths to tell you how prestigious and world renowned they are (usually in research), what extras are they offering you like leadership, team working, organisation and time management options, because ultimately when it comes to getting a job, they are the things that count. The colour of your tie is pretty much irrelevant. There are nerds out there who have been programming since they were 5 who would get the job ahead of a 1st class Oxbridge scholar any day purely based on skill and ability to do the job.
Good luck!