In what way is it superior?

When comparing the MyCloudEX2 with the EX4 in what way is the latter superior? What will i benefit when using the EX4 compared to the EX2?

more Hard Disks means more space possibility and other RAID configurations, such as RAID 5, which provides redundancy and high speed just loosing one HD space (if fully populated).

Same RAM on both models but faster processor on EX4.

OS and SW characteristics are pretty much thre same, I guess