BG5EYK If you only consider the frequency bands, the 750 MHz vertical antenna has a bandpass filter, allowing it to operate in multiple bands with a single installation. The JPC-12 (now called PAC-12) requires adjustments to the antenna length when switching between bands. If you only consider the antenna type, the vertical antenna has slightly lower base noise, while the GP antenna has a lower transmit angle and is better suited for DX communication.