There isn't a twin engine fighter in the war that wasn't outclassed by singles. Including the vaunted mosquito.
I am a Mosquito fan and I'd never claim it was better than most single engined fighters. Some yes, but not many.
The only twin engined fighter to see action in WWII that could claim to be better than many single engined fighters is the P-38, and even it is outclassed by a good number of single engined fighters.