Like Joseph i felt more like a slave during VCE. Part of the definition of slavery is being "unfree" and "forced" right? I feel like there is significantly more of that in VCE.
For starters you *had* to attend school every day. You don't need to go to uni at all (but if you miss enough labs/tutes you will fail). You don't have to do your homework, you just might fail. There is no uniform or mostly set times.
Uni comes in waves. At high-tide its pretty bad, around the time all your assignments are due but as long as you pace yourself, it isn't so bad and low-tide (so to speak) is even better. If you pace yourself and spread your work out over weeks, it is way more cushy than VCE i reckon.
First year for most disciplines is particularly bad. There is often a learning and adjustment curve and you know none of the "tricks". In first year science, its normal to have 3 lectures a week (3 hours for each subject) along with a 3 hour lab and sometimes a tutorial. In second year onwards, most subjects only have 2 lectures. An hour less doesn't sound like a lot but it makes a huge difference in terms of content to learn, exams and how often you need to go in (1/3rd less!).
If you feel like a slave or like you have no free time, you are either a first year or you are doing something very wrong in my opinion. Uni is glorious compared to school. I only need to go in 2-3 days a week, when i do go i work my arse off but still, i get a massive weekend. All my stuff still gets done to a reasonable quality because i start it a week before its due often.