Spitfire MkV: Great Turner, great diver (as it was in real life- wasn't it the IX that got to Mach .92 in a dive?).
Spitfire MkIX: Decent top speed, mediocre acceleration, great turning (mediocre when compared to V, and great diver.
La7: Very Mediocre turner, very fast, doesn't slow down as quickly in a turn and excellent acceleration. 3 cannon option makes it a newbie's choice.
In every game I've been in, newbies gravitate to the Spits. Hell, I did in WarBirds because it was my first time online. Shortly after I got used to the flight model (most advanced at the time), I started to really like the German aircraft.
Sure, some planes are easier to give you angles on the plane you are fighting against... but you allowed them to use their plane's strengths against your plane's weaknesses.
A perfect example of why it's the pilot, not the plane.
-SW