Well, what appeals to you more? I was considering engineering for a while but after speaking with some engineers, considering the cost of engineering schools, considering my age, and considering how much I like computers I decided to go for CS.
I had a motors control class with a very professional looking (he dressed as though he was already working for a company) senior year mechatronics engineering student. Since his degree was all theory the company that hired him paid for him to learn some hands on things, such as plc programming, motor controls, etc.
While I was very good at those things, and I love calculus, computers just interest me more. Hardware, hex conversions, programming, networking, cyber crime laws, encryption, number theory, linear algebra, and so forth all interest me to the point of obsession so the change in majors just made sense for me.
As for salary, being talented with either degree will lead you towards a decent salary, it just depends on you. Go for what you enjoy, not just the higher salary. If you enjoy it you're more likely to do the extra studying that can push you ahead of everyone else.
I'd post more but I studied 10 hours today and it's late, I welcome anyone to disagree with or correct me.