Comment by Fluorescence

For the same spec it's likely to be a different chip count rather than density. In theory two sticks could have higher bom... not that consumers would see such savings given the price segmentation where the appetite for higher capacities has deeper pockets.

Have recent boards/cpus fixed the instability problems people had with 4 sticks of DDR5 yet?

I was shocked when I saw folk saying you can't use 4 slots. It would mean that a one stick build would have an upgrade path but if you started with 2, you'd have to replace them.