The nice thing about vibration is it's simple, and a single feeder can do a bunch of tubes - the trick is getting the 'exit' area right so a chip gets to a consistent position without pile-ups. The RV ones are pretty hopeless.
A non-optimal exit zone can be useable by tweaking the vibration level, but this is a problem if different lanes need different amounts of shake. Maybe a way to adjust vibration level per-part might be useful, as well as stopping the vib when not using the feeder.
You certainly want to be able to load a bunch of tubes of the same part - not sure if the RV software supports this.
Never seen air-puff in action but I suspect it may have consistency problems, not to mention higher cost/complexity - I can see more downsides than upsides compared to vibs.
Bear in mind that there are a lot of different shapes/sizes of tubed parts.
I know many subcontractors won't use tubes on machines and always re-tape, but not sure to what extent this is for better picking or fewer downtime reloading.