I have a HP B9180 here and also a Z3100.
Because of the gloss enhancer- you will find it is better with glossy papers.
Both printers are very constant in their output. The HP z3200 has a better gamut and because of the gloss enhancer - prints on glossy paper are not prone to gloss differences and bronzing. indeed the best glossy paper for the HP9180 is HP Advanced Photo Paper.
I would say take one test image - print it on the HPB9180 and keep it a s a reference.
Then print it with a z3200 on a glossy HP paper with the right profile and you will notice it is about the same. Make sure you do everything right with colormanagement etc. write down how you printed it.
I am a photographer and for checking my work is send out( not for presentation), i use HP everyday pigment glossy paper.
I has a wide gamut and looks good for its purpose, and its cheap. The z3200 is much cheaper on ink because of the larger cartridges.