Any advantage to using Erase.. vs Smart..?

[G.Wright]

Originally Posted by dnanian

Yes, a Smart Updated volume, like any active drive, will fragment. An erase-then-copy will defragment the files... but does it really matter?

I dunno - probably not.

I'm using Smart Update to clone Drive A to Drive B, then B back to A, A back to B, etc. My concern is this:
Is there any cumulative effect of updating a clone of an updated clone?

That is, would there be any practical advantage to periodically using Erase, Then Copy?

I acknowledge the answer to the following question may not have any real-world significance, but just to be sure I understand how this works:
Are you saying Erase, Then Clone actually defragments files, whatever the cause of that fragmentation may have been - as opposed to merely avoiding any fragmentation that may have resulted from doing a Smart Update?