I traced the difference to a "CE" vs. "NON CE" version of Micropore. I used to use the "NON-CE" version while now I have the "CE" version.
The "CE" version has the CE logo printed inside the roll:
and came in this package:
while the NON CE version does not have the CE logo:
( I do not have the original package for this)
The CE version is more breathable than the NON CE version so CE version is not as good for mouth taping...
The CE version feels different when opening the roll than the NON CE version.
The CE version even smells different than the NON CE version.
They are very similar and have the same catalog number 1530-2 but they are not identical!
Which version do you have? what's your experience?