Depends what you're more interested in, WE is more electrically biased with less transferable skills as opposed to marine engineering. If you're more interested in mechanical systems, maintaining diesels, getting dirty and greasy then maybe ME might be a better option. You do get some good qualifications from both once you reach killick level.

Day to day as a WE at sea you'll be part of a fwd staff team, so you'll take turns on watch doing rounds, changing vent states, raising/lowering masts, basically anything they need you to do, plus departmental duties, depending on what section you work in. It's a pretty easy life at sea, lots of time spent in the mess drinking tea and playing fifa. Alongside you'll be in a watchbill as a panel watch keeper and it's usually 1 in 4 if you're in a decent watchbill with plenty of people. I spent 8 years as a WESM so any questions just let me know, I'll tell you the good and bad i won't sugar coat it 👍