Huawei G300 not fast enough for Google Racer So on my Nexus 7 (currently clocked at 1300mb RAM) Google Racer works fine. However, when I use it on my Huawei Ascend G300 (only clocked at ~30mb less RAM) it says it is too slow.

This doesn't really make any sense? They have almost identical RAM?
Running a game smoothly does depend on RAM as well as the capability of your processor and more significantly the graphics chipset employed on your device. Compare all three of these factors and you'll understand hopefully why your Huawei G300 doesn't run the game of your choice as well as your Nexus 7.