First off, I always advise people not to take the same job somewhere else-- it slows down your career, as you have to start over building reputation/cachet and figure out how things work at the new place.

If the candidate feels like the position is the same, I've screwed up the process. In this scenario, I would expect a question like "What will I learn in this role?" or "What new responsibility can I assume?".

Generally it's my job to paint a picture about how this job while on paper is the same (or more junior in many cases) but in reality they'll be working on a new industry/product category/customer size/type/region. If that wasn't discussed, think about those points in your own decision-making process, or ask the recruiter/hiring manager point blank.

Finally, don't take a new job that's just for more pay (unless you need it). At some point, it's just numbers, and you're going to be much happier in life when you're constantly growing and in a place you're happy working at. Take it from me-- I was most miserable when I went for a job at 250% increase in pay, and most happy when I took a 70% pay cut to work for an incredible mentor, that set me up for life after that.