In this paper, we performed the comparisons between polarization diversity using dual polarization antennal which has $pm45^{circ}$slanted linear polarization characteristics and conventional space diversity in rural and residential areas. The analysis was done by evaluating the diversity gain improvement and cross correlation coefficients between two received signals through each diversity branch. From the results, we could confirmed that space diversity has bigger diversity gain than polarization diversity by 1~2 dB, and there is a little difference of $pm0.1$ in cross correlation coefficients by analyzing CDF under portable mobile phone environments.