The normal Burston rifle got a visual overhaul as well as a new reload to fit the new design. The reload animation is similar to the prime, making the two weapons more similar. I do not own the normal burston on my account so i used an old one i had for testing as i happened to have the burston on that account. Personally i like the new design but i'll stick with the prime.
You know, you would think as a wiki admin i would be able to try stuff out or showcase things first hand without having to purchase them (even if it meant i would not be able to keep it after testing) so i wouldn't have to rely on a different dud account to test these things. Oh well. It's not like i'm a famous youtuber or anything that gets those kinds of privileges.