THE STREAM S06 & S07 6TB
In terms of size both drives are close with the S06 measuring 199mm in length, 117.7mm in width and 36.3mm in thickness and the S07 measuring 171mm in length, 113.6mm in width and 34.9mm in thickness.
Of course, it's the handle that actually boosts the length of the S06 (measures roughly 27mm).
There are two ways one can position the drives as you can see from the above picture (rubber feet on two sides).
The textured enclosure of the Stream S07 looks nice but it's only reasonable that some people may not like it.
Both drives have the USB-A ports at the front right next to the DC in.
As mentioned earlier the Stream S06 features a Seagate Barracuda ST6000DM003 HDD whereas the Stream S07 features the WD Blue WD60EZAZ HDD.