Anker 8200: economical; software-configurable colours (sorry but I cannot stand blue lights, like what some mice are limited to); easily allows switching between 4 levels of precision, which helps when drawing in a graphics editor; forward and backward buttons, which are not only essential in a Web browser, but are also very useful when switching between scroll positions in a long code file; good tracking; and overall a nice feel.
Anker 8200: economical; software-configurable colours (sorry but I cannot stand blue lights, like what some mice are limited to); easily allows switching between 4 levels of precision, which helps when drawing in a graphics editor; forward and backward buttons, which are not only essential in a Web browser, but are also very useful when switching between scroll positions in a long code file; good tracking; and overall a nice feel.