Infinity vs Unity
Venganza drew every form of energy in a radius of several light-years into his body, which then would merge around his fists. Each attack carried an immense weight and gravitational force, twisting space-time to a point even Rank 9 life forms would not recognize them.
The Flame Imperator's attacks were different. While the Incarnation of Death and Destruction's Truth seemed to embody the consolidation of everything, his Truth was the absence of everything. Space-time would freeze before vanishing as those white flaming strikes drove forward.
Back when Venganza and the Flame Imperator clashed in the Prima Universe, neither used their full power as they understood how dangerous that would be for the universe. However, now they were in the Eldritch Universe, catastrophic collateral damage was something both were very happy to see.