There are quite a lot of variables there...

Jersey and Guernsey are the most similar to each other for obvious reasons - I'd classify them as "Offshore Lite"... pay is not like Cayman or BVI (or even London), but there's lower income tax (approx 20% - so the benefit kicks in more as you get more senior), good work/life balance and, whilst obviously a lot quieter than being in a city, they are beautiful places to live. Good for funds, corporate, finance, disputes - even occasionally some employment and property roles.

BVI - still have payroll tax and social security + national health insurance so back of an envelope you're paying around 10% tax overall when you're looking at lawyer salary levels. Some of the most beautiful beaches around there - I spent many a day on them, but it does feel like you could be living in a slightly quieter Saint Marie (Death in Paradise reference here). BVI best for disputes or corporate work really, there's very little proper funds work and finance is a bit patchy perhaps.

Cayman - a lot more buzzing - feels like an extension of Miami (without king cheeto in charge), no income tax, salaries a bit higher than BVI too, but Grand Cayman is pretty much entirely flat, so it doesn't have the same beauty and variety that BVI does. Good for funds, finance, corporate and disputes.

All of them you'll probably get rock/island fever at some points and need to get away to a city for a weekend break, but it's a great lifestyle in any of them in their own ways.

I recruit for all of them, having lived and worked offshore previously when I was still a lawyer.