[Omar]

They are pretty much the same. I used them at different times more from a personal preference. I use shift reg more just because I have been programming with LabVIEW from the early 90's and grew up with shift reg.

I use shift reg 3/4 of the time.

I use feedback nodes to save space on the block diagram and to keep from running wire all cross my block diagram. I most only use the feed back nodes pointing to the right. I do not like to have any wires going from right to left. So in those cases I use shift reg. These are all personal preferences and not the same for everyone.

I have never seen any real speed differences that really matters.

The feedback mode dose have some built in functions that to do the same with shift reg you would have to add a little code. But anything you can do with a feed node you can do with a shift reg and a little extra code.

There are some extra initialization setting (configuring) that the shift reg does not have, but I never had a need for them.

Which one you use is up to YOU.