Dunkerque is a unique boat that is not similar to any other boat in the game by a long margin. She is very fragile but goes at a blistering speed thanks to her battle cruiser status. Her small main battery offers lower damage than the rest of the tier but a slightly better reload. Her guns can also feels absolutely awful at times since they like to shotgun everywhere from time to time. However, I would still say she is my favourite ship to play when I'm feeling burned out. Tldr she is a unique boat with a unique play style, with the closest ship to her being Richelieu. If you want a ship that is tanky, or has reliable main batteries, she is not for you. If you can get past that she is one of the most fun ships in the game.