What I meant by "imply" was that the Park Tools web site says that "their" tool (BBT-9) fits both, but that could mean that they're the same, or that the Park tool is a special multi-purpose tool.

Unhelpfully all the UK retailers just list the Park tool as suitable for Shimano Hollowtech II, not mentioning Campag at all. Also they don't quote the Park part number, but just list it as a Park Tools wrench for Shimano HTII.

Tony S