Is it better since the XPS has higher ghz then the AMD? XPS: http://www.dell.com/en-us/shop/productdetails/xps-8910-desktop/fdcwvmax101b
AMD: http://www.dell.com/en-us/shop/productdetails/inspiron-3656-desktop/ddccz301b
AMD: http://www.dell.com/en-us/shop/productdetails/inspiron-3656-desktop/ddccz301b