Hi,
here is a german guy having two D24TIC with 297's. One is equipped with Bosch's original version, one with Henzo's. Both are running very smooth with these nozzles; I'd say you made the right choice.
Henzo's rebuild are made in Italy, in my D24TIC I've used them now for roughly 40.000km and they are still working fine. On a Golf III AAZ I was using them for I don't know how many kilometers and had no problems with them.
Bosch is original quality, I think there has nothing to be mentioned.
BR
Frank