The most powerful Hulk incarnation from WWHulk, and Incredible Hulks vs Former Hulk incarnation createt because of time travel. It is unknown if this version is stronger than Green Scar, but some believe he is. Green Scar has Banner Intellect and works with him more than any other hulk incarnation. Hulk Squared is more savage than Savage Hulk and he never talks. So, you Hulk fans could give me an information about this.
Round 1. - Green Scar can fight like a beast but he can not turn into the World Breaker.
Round 2. - He is World Breaker!