I had an internship in Industry and there were a lot of perks, good pay, and ability for growth to move up. However on a day-to-day basis you were really only expected to follow the SOPs and record keep as appropriate.
On the non-profit side, there is a more flexible culture where creativity and change are a little more accepting. I found myself finding problems and people supported my solutions to make things better. On the industry side it was more of traditional attitude of well this is how we do things and just follow the SOPs and do your job.
There are pros and cons to both as many have mentioned. Like Scott pointed out- things like personality can be a factor. Maybe you like to have SOPs and follow them and be done for the day and aren’t necessarily looking to change anything. Maybe you would like a more flexible work environment and aren’t concerned as much about the salary.