Sometimes, you want or need the fastest components available. Other times, more capacity and reliability is needed. There are several programs available that test the performance of a hard disk. Some are disappointing while others are good. In any case, if you have one, you get numbers that tell you something.
Different benchmarks mean different numbers.
Different environments mean different numbers. To which channel is the hard disk connected Is the hard disk alone or together with other devices connected to the controller Under which operating system is the hard disk tested and used Which drivers are loaded or not loaded. Testing at Monday or Friday etc.