Just that really. What are the pros and cons of each? Arts/ humanities degree equally matched more or less on league tables.
You know, it's not a very productive question really - the pros and cons are not "objective." What might be a pro for some (isolated campus university ie Warwick) might be a con for others & they might prefer Exeter's location only 5 minutes walk from the City centre.
What you've got in this thread are simply other people's preferences. Or what they noticed. Or what they've heard (rumour & hearsay).
Far better to collect your own information via league tables - which you've done. But you know that league tables are not objectiove measures either? They're made up from publicly available statistics by newspapers & other commercial entities. And not all league tables are the same? (The Guardian doesn't include REF/research scores which is just silly). If you do use league tables, you know you can sort them (online) by the different criteria. So you can make comparisons of, say, staff-student ratio, or REF scores, or value-added scores, etc etc.
Your question asks an unanswerable question: you need to think about what are the things you're interested in in a degree course, and a university, and then research those.
Take what people say here as simply personal preference - but I'd be sceptical of all but first-hand experience. Sometimes this forum has as much hearsay & bad information as The Student Room!
For example, the "needing" formal dress at Exeter - well, when I taught there, I don't think my students did many formals - most of them seemed too busy doing musical theatre. So you need to take things with a pinch of salt.
The other thing most people don't realise is that if you dig into university websites you can find out a lot about current teaching, and on the student union website you can generally dig into student life - online editions of the campus student newspaper for example. At my place, you have to get past the UCAS selling pages for degree courses, and go to the Departmental website. (Although at post-92s, that's hard as they seem to want to hide the actual day to day stuff).
Have a look at the biographies & publications & other activities of the academic staff in fields you're interested in. See whether they are the people writing the work at the cutting edge - at a research-led university in the Humanities they will be teaching it as well.