Consider that most cMP's have gobs of ECC Ram, and other hardware, compared to those "older" systems with a less demanding (older, in most cases) OS to load, and less hardware to initialize.
I could pull all my memory (save one 8GB stick), load up a much older OS, pull all my PCIe cards, and use only 1 installed SATA SSD and it would be blindingly fast boot times.
When you start loading up on hardware (like loading down a truck), pulling out from a stop is slower, but top speed may or may not be affected.
It's not ALL about the hard/ssd drive when booting.
Not really an equal comparison....
I could pull all my memory (save one 8GB stick), load up a much older OS, pull all my PCIe cards, and use only 1 installed SATA SSD and it would be blindingly fast boot times.
When you start loading up on hardware (like loading down a truck), pulling out from a stop is slower, but top speed may or may not be affected.
It's not ALL about the hard/ssd drive when booting.
Not really an equal comparison....