Encountered two different kinds of dryer tape (metallic silver plastic vs actual foil)?
The issue with non-metallic tape and conduits for dryer vents is static electricity and the accumulation of lint.
Flammability and emission of toxic fumes in the event of a fire is also a reason for using metallic tape.
Code (in my area) prescribes metallic tape for this reason.
Plastic is not allowed. Also, no screws allowed, again due to lint capture.
(I don't see how plastic tape wrapped around fitted metallic piping/conduits -on the outside- would become electrostaticaly charged, so I appreciate doubts around that argument)
Since metallic tape rips easily, and screwing is not allowed, the piping must be supported very well.
Plastic tape would be stronger. If it is fire rated (FR for conduits) then perhaps it could be allowed.