Just for fun, let's use a car analogy to compare the 8 GB and 16 GB version.
The 16 GB version is like an Audi RS 6 Avant. It's very very fast and since it's a wagon it can carry a lot of stuff.
The 8 GB version is like an Audi RS 5. It's also very very fast but it can't carry the same amount of stuff.
So for workloads where you need to move a lot of stuff, the RS 6(16 GB) will be faster. The RS 5(8 GB) version can move the same amount of stuff, but it will have to drive multiple times back and forth, making it take longer.
For situations where you don't need to move a lot stuff, you just need to move it fast. They will be more or less identical in performance.
😁