Inherent advantages of burning HDD-to-disc:
-reduced chance of read errors from the source messing up the burning process
-faster when doing 2 or more copies, & less taxing [source drive won’t have to re-read the data]
-possibly reduced chance of buffer underruns [from the source drive being too slow, for example]
Advantages of Disc-to-Disc:
-faster for just doing one copy [when in optimal conditions]
-no need to have a set amount of free space on your HDD
Quality wise? Unless you have power supply issues, there shouldn’t be too much of a benefit here. Since you have SATA drives, no sharing of channels.
I’m thinking that a lot of people are copying media that requires tweaks/editing, which [or course] works better from hard drive. As such, it’s a required step to go to HDD first.
But I’m sure for the few times people just copy normal CDs or something, they use disc-to-disc. I know I will if I’m in a hurry.