Surge is a post-workout drink for better recovery. Let's say you just killed yourself at the gym, Surge would help you recover faster for the nextwork. Creatine just supplies ATP energy for stronger lifts.
Surge and Creatine are not the same thing. It's like apples and oranges when compared between the two.
All creatine is the same. Your best bet is to buy microminized creatine for quicker intake, but aside from that, it doesn't matter if you bought Willy Wonka and the Choclate Factory Creatine and GNC.
Just get micromized creatine. Micro means smaller particles aka easier intake for the body. 30 dollars is too expensive for creatine.