Hot sleeper - duvet or quilt?

I moved into my apartment last year. I’ve had a duvet for probably 5+ years and like it. However, last winter, I was impossibly warm.

My current spot uses more old school heating (we have a boiler). My apartment gets so hot. I’d find myself waking up and having to crack open my window. I’d eventually fall asleep and then wake up freezing thanks to being in the northern part of the US.

It’s already getting quite cold, so I’m seriously debating to get a thicker quilt or bring out the duvet. Does anyone have recommendations for different duvet inserts/covers that are more breathable? Pros/cons are helpful too. Thanks :)