Comet SMA-24J (SMA-Female) vs Nagoya NA-320A (Tri-Band)

The Nagoya NA-320A is the clear winner here. Both antennas share identical physical dimensions and deliver the same performance on VHF and UHF, but the Nagoya adds a genuine third band at 1.25m where it achieves 1.2 dBi gain. That extra band coverage costs $9 less than the Comet.

The single most important differentiator is band coverage. If you operate on 223 MHz, the choice is obvious. Even if you don't, the Nagoya's flexibility justifies its score advantage without any performance penalty on your primary bands.

The Comet SMA-24J makes sense only if you specifically need a radio-specific connector or have stock compatibility reasons with existing equipment. The Nagoya NA-320A is the right choice for anyone wanting broader capability at a lower price.

Get the Nagoya. It delivers the same performance where both antennas operate, costs less, and adds a usable band. There's no scenario where the Comet's advantages outweigh losing both price and capability.