I've got his glass over aluminum in zebrawood, this is the combo that he won the DD Adams with this year. I also have his aluminum in maple. Both are great sounding calls. I think you'd be very happy with the zebrawood glass/aluminum, great looking and sounding call.
Compared to some of my other favorite crystal and glass calls (Schaffer, Lonzo, Halloran etc..). Hanks glass is higher pitched and a little less rasp than some of the others. His aluminum call has a nice pop in clucks and cutting.