"Angle would be as published for each individual item, which can be the same, but doesn't have to be."
Some more research seems to point at (at least in ICAO world) Annex 14 being a controlling document and it seems to indicate that for precision approaches they are, for non-precision they don't have to be?
Looking at the ones with the notation on the Jepp charts about non-coincidence that I've quickly gone through the PAPI and ILS glideslopes have been the same, just different TCH - but that sample isn't by any means exhaustive.