Have you read the pdf on headset sizes in technical support on the Hope website? It’s very helpful.
http://www.hopetech.com/webtop/modules/_repository/documents/HOPEHEADSETS2011Web.pdf
Getting access to a micromoter to measure dimensions of the headtube will make your life a lot easier.
Not sure what they mean by “Campy style” but as far as the bottom is concerned one solution to futureproof yourself is fitting any headset for a tapered steerer and then getting the reducer shown in the bottom of the picture you posted. This is a top-hat shaped piece of aluminium where the inside fits over a 1 1/8th steerer and the outside is the same size as a 1 1/2 steerer so the crown race for a 1 1/2 fits over it as normal. They’re about £8 and (I believe) work with any headset.
I’ve not seen one but I believe the Superstar solution is to supply two crown races, one to fit a 1 1/8th steerer and one to fit 1 1/2.