Maintenance & Durability
Although a majority of our customers choose granite, both countertops are at the top of the market for durability and low maintenance. Granite countertops can be permanently sealed and our warranty on the stone is better than what you will get with the quartz manufacturers. You are unlikely to have issues with either granite or quartz. Both are hard and resistant to scratching. Both are at the top of the market for durability and little to no maintenance.
Color and Style
Here is where I see the best use for the two options: If you are going for a more euro/modern look, a solid colored quartz is more likely to give you that. If you kitchen is more traditional or transitional, granite may be a better alternative.
In my opinion, quartz colors that try to mimic the look of granite look like fake granite. Just get the real deal rather than something that tries to look like something it is not. However, if you want a solid color and are going more modern look, quartz is more likely to give you that.
Cost of Quartz vs Granite
An entry level granite will be less than an entry level quartz. Generally, granite will be a little less than quartz but it can also be more depending on the color. There are other factors that affect the cost and that is the size of the slabs and the size of your countertops. The size of your countertops will determine how many slabs you need. Quartz slabs are smaller in size and if you have and island or peninsula it can result in having to buy more slabs and having a higher waste factor.
It is difficult to give an straight forward answer as there are so many variables. If you were thinking quartz is less than granite it is not… generally. In certain cases it may be, but not by much.