I woildn,t use both, the way i was going to do it was -Clean the corners thoroughly-Lay a good size bead of caulk on both sides of the corner and inside both sides of the trim- Screw them together and clean up the excess.
Remenber, i did go with the brutly tape, the final results were great, but what a total pain to work with, as i said before, if i did it again ,i'd go the caulk way.
If you use the caulk, let us know how it went.
Jim
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