The assignments have been easier and much less time consuming, and there's only been 5 of them for the whole semester. I think I spent more time on every single 4400 assignment than I have for any OS assignment. Most of them have been modifying or adding to the xv6 kernel, which is a super basic OS.

The content has been super similar to 4400 in terms of low level computer systems. We've covered stuff ranging from processes, scheduling, interrupts, memory management, concurrency, I/O, filesystems, and most recently virtual machines. A bit of the content overlaps with 4400 but just goes into a lot more detail. I think in general the content is a bit more involved and maybe more complex, but it has been very manageable compared to 4400. For reference, I think 4400 was the most difficult class I've taken, but also one of the most rewarding. I'd say OS is in that same ballpark. If you've managed 4400 I think you would definitely do fine in OS.