Tough call to say which is my favorite, this is like a light machine gun so you have distance and power. The A280C is like an Assault, quicker.
The more i see this on leaked footage, the more I like this gun better than the A280. This is a light machine gun so it will be a larger magazine, or a longer heat up most likely, shoot slower, but be more powerful. The A280 is like an Assault weapon.