what Allied aircraft are the best in this game?

[MaxGunz]

When you are moving fast there are better ways to change direction than through horizontal turns. In fact, every other way is more efficient.

Horizontal turns past 20 or 30 degrees are for angle fighters and mudhens.

A half loop is better than an extended horizontal turn. Zooming up and turning at your best turn speed is better. Turning on a tilted circle is better. Rolling while zoom climbing or steeply diving and pulling out on the new heading is better. You can regain lost speed by losing height once you have changed direction, you will have lost less energy than in a horizontal turn at high speed if you keep the G's you pull down so don't jerk the nose up and expect great results, that won't work.

A good lone-plane exercise is to start flying a wide horizontal circle a few times around to get your speed up and stable. Then make the circle tilt and let it go egg shape. Don't let it get slow at the top and see how fast you get along the bottom then tilt up some more. With practice and observation you can find out what slows you down and what lets you go the fastest. Keep an eye on slip (The Ball) until you don't need to, watch your trim or make it neutral and see what effect that has.
In time work some pure vertical into it and roll to change your exit heading, for high speed planes with lousy wingloading and good to great roll rates there is no quicker way to make radical heading changes.

Or you can turn your FW the same way you'd turn a Spit and complain how poorly FW's turn.

Add: if you maintain your energy then people who do not will think you're cheating. Some will even say so.