For the application of the Multiple Signal Classification (MUSIC) algorithm with super-resolution capabilities in the direction finding of passive radar seeker heads based on conformal polarization-sensitive arrays, the definition of spectral function angular resolution and the discrimination angle threshold are proposed. By approximating the expected value under the asymptotically biased condition using the definition of the MUSIC algorithm's zero spectrum, the corresponding angular resolution expressions for vector array and scalar array models are derived respectively. Taking the uniform circular array as an example, the influence of various parameters on angular resolution is quantitatively analyzed based on the computer simulation model, and the statistical values of the discrimination angle threshold for scalar and vector arrays are compared. Simulation results show that under the same array and signal source parameter settings, the discrimination angle value of the scalar uniform circular array is generally higher than that of the vector uniform circular array.