According to this guy in my Pre-Calc class, his 2 ap classes in one semester of high school are harder than a whole year of college classes. He said that it's harder to manage the work-load of ap classes (one of which is government) than college classes. I'm in AP Government (and unfortunately the same period as him) and not only is it by far the easiest AP Class I've ever taken, but the work load is nothing to complain about. The only homework we get is about 4-6 pages of book work and about 4 worksheets. We get all of that at once and we have 2 weeks to do it. It's not bad at all. I couldn't help but chuckle at him, and then be a little disgusted that I'm in the same school as him.
Everything is factored into schooling. Some professors are more strict, someone may be more capable in some classes, schools themselves, someone's determination, et cetera.
Different people, different fortes. I've found that college classes tend to be more lax when it comes to work and usually you get to do stuff solo. It's less taxing in that regard. But it's also dependent on how you manage yourself personally. It could be that this person you're judging has a -slightly- different lifestyle and as such, he finds it hard.
Uni is easier than college or 6th form (equivalent of the last couple years of high school) I have found so far, living in the UK. The things is you study one thing in a bachelor's degree, or at best you combine two subjects, but in the end we're talking two focuses of your brain. 6th form requires at least three subject choices but on regular, less on rare occasions. It's not silly assumption to make that the higher you go the work'll be harder, it's mainly the course you take and what they want from you that decides that.
You find that people are on different levels when they start a course. So the first year of Uni is getting everyone to the same basic level. The first year is a cake walk (though not always). For a lot of the classes I was taking, I was retreading stuff I learnt in A levels. If anything it's the time to really unwind and enjoy Uni life and settle in. The second and third year can kick your arse if you don't set yourself a schedule. Also, the fact to aren't forced to do the research and work outside of lessons is a factor. They advise you rather than force you. You won't get bollocked for not turning up to class, nor will they question it. The lecturer knows at the end of the day those that don't turn up or put any effort in themselves won't pass.