At this stage, go for industrial experience --- we already have too many academics who have none or whose experience is severely out of date.
Your industrial exposure will do you nothing but good. You will be exposed to a completely different environment where you can't just "do enough to pass". You will make new friends and you will learn a hell of a lot. In my experience, Universities are very boring places once the undergraduates go for the summer.
After you graduate, with a couple of years experience, you may find many academic institutions delighted to have you work part-time, so it's not necessarily an "either or" choice. You can do both as I have done for a few years -- I do "real work" for money, and academic project supervision for kicks.
Given the choice, I'd do something more academically oriented myself. Unfortunately, it pays very badly compared with industry and I like eating regularly, some level of warmth, and clothing without large holes in it (the last academic position I was offered would barely have covered my rent).
Do what you want to do and what feels right. You are, I assume, young enough to make a few mistakes, change direction, and have a lot of fun in the process.
