Gangut and Colossus dreadnoughts at Tsushima

What changes at Tsushima if Russia has Gangut-class battleships and Japan has Colossus-class ships?

Japan still wins because the Russian ships reach the battle in poor condition and face a concentrated twelve-inch-gun fleet without adequate repair support.

The Gangut design itself is not dismissed; the decisive handicap is the fleet's exhausted material condition after its journey. Modern guns cannot compensate for machinery, crews, and ships worn down by a voyage halfway around the world. The Russians would need a Singapore-scale repair and supply base plus months of work to restore combat readiness. Without that pause, Japan's Colossus-type force still meets an opponent already beaten down by logistics before firing begins.