An interesting matchup at least in my opinion

[Akimalyn2380]

Another thing to consider into the equation: the Kelvin universe was heavily influenced and altered via salvaged tech from the encounters with Nero's ship, which in theory would bring Cumberbun's Vengeance ship tech on par with Shinzon' Scimitar, especially since it's builders (Section 31) don't abide by things like the Temporal Prime Directive...

Therefore, it would be less likely that a Scimitar would win.