#hardware SSD vs HDD
Ran some benchmark.
SSD write speed : 160 to 190 MB/sec
HDD write speed : 80 to 110 MB/sec.
That's the range of values I found running the benchmarks multiple times on both the disks.
Therefore SSDs are at best twice the speed of HDDs. And that's it.
Compare that with write speed of 50 MB/sec for a very cheap disk.