Why do you think you can only have an 8” overhang with quartz and 11” with granite? You can have whatever size overhang you want with either one as long as you build in the proper supports. Are you doing bar or counter height? Recommended overhang for bar height is 12” and counter height is 15”. You can do those with either material. In fact, I believe you can actually have more overhang with quartz than granite before you need support.

As far as choosing, which product do you like best? Some people like quartz because it is non porous and doesn’t stain as easily. I personally don’t care for the manufactured look of quartz so I chose granite. Quartzite is also a natural stone choice. Which you choose really depends on your taste.

I find quartz over priced and faddish right now- it is just too plasticky for me to like for the money. Just my two cents. Get granite or quartzite or soapstone.