Overclocked BD

Features: First of all lets talk about the similarities. Both the mice have 3000+ dpi. A4tech X7-747H comes with max dpi of 3600 whereas the Gigabyte comes with 400 less, which means max dpi of 3200. This wont affect your choice if you dont use more than 1600dpi. Both the A4tech and Gigabyte has 2 extra buttons on the let size, useable with the thumb. You can adjust settings like reload, volume up and down, also set one of them to shut down or open a file. These buttons are pretty handy during gaming or photo editing. The mice also have gold platted USB connectors and good quality cables for more long lasting usage. The major difference starts from its DPI adjusting button. The Gigabyte has 2. One as + to increase the DPI and the second one as - to decrease, where as the A4tech has only one. Thanks to this, on the Gigabyte you can shift from a lower DPI to a higher one pretty easily. On the A4tech you have to scroll around the higher DPI settings to get back to a lower setting, which can be a distraction during gaming. However there is the option to excluded DPI settings that you do not use on the A4tech which makes up for the inconvenience. A4tech also has an extra advantage of weight adjust. There are small weights of 15.5 grams that you can add or remove to increase or decrease the weight of your mouse, making it more personalized.

Grip: This is also where the mice are deeply apart. The Gigabyte has a claw type grip, good for large hands, whereas the A4tech has  a slope, which does not provide a good grip during intense gaming session. Both the mouse come with rubbered sides to increase grip. 

Gaming Experience: No matter how many features a gear boasts, all comes down to the gaming experience. Both the mice were tried out in Battlefield: Bad Company 2 (Hard Mode), Call of Duty: Mordern Warfare 2 and Homefront at 800-1600 variable DPI on a Razer Sphex gaming desktop skin. The Gigabyte provided a good grip and easy DPI shift. The A4tech makes up for the bad grip and inconvenient DPI adjusting button, by being more controllable as the weight seems to be just right, since it was manually configured. 

Final Verdict: It was a close call but there can only be one winner. Both the Gigabyte M6900 and A4tech X7-747H are value for money products. However, we at OCBD found the A4tech to be more comfortable. Although the features don't vary that much, but we got a better gaming experience out of the A4tech. So the