If you combine the FPV and attitude, then technically yes. However, you will also need to know what reference the attitude is taken from (one would assume the body angle) and compare this with the angel of incidence. So it's a bit complex.
Have I glossed over something? I reckon the simple difference between the FPV and PFD attitude in all phases is the angle of attack (within the limitation of the FPV capabilities of course).