And even then the LA7 owns it at low altitudes, being about 12-15 MPH faster than the 51 and having about a 1000 FPM climbrate advantage while having parity or better in maneuverability.
IMO the LA7 sort of resembles a stripped-down hot-rod...it has incredible performance, but that's ALL it has--it has no range, no A2G capacity, somewhat poor weapons, and can only reach that great performance at a somewhat limited altitude range.
That lack of versatility and combat duration is IMO what keeps the LA7 from being "too good", and probably is why it doesn't see more use than it does.
J_A_B