ABBREE 18.8-inch Foldable Tactical (SMA-Female) vs Nagoya NA-771 (SMA-Female)

The ABBREE wins this comparison. Both antennas are compromised on VHF, but the ABBREE's superior UHF performance and dramatically lower price make it the better choice for most users.

The critical difference is electrical length on UHF. At 435 MHz, the ABBREE reaches 0.69 wavelengths (5/8 wave) delivering realistic 2.5 dBi gain, while the Nagoya stops at 0.57 wavelengths with 2.9 dBi claimed gain that its physical length does not support. The Nagoya's claim is overstated. The ABBREE's claim of 2.15 dBi is conservative and realistic.

On VHF both antennas are electrically short and weak. The ABBREE at 0.23 wavelengths is slightly better than the Nagoya at 0.19, but neither is ideal for 146 MHz operation. If VHF is your priority, neither antenna will satisfy you.

Buy the ABBREE if you primarily operate UHF or run a mixed VHF/UHF radio and need a budget handheld antenna. Buy the Nagoya only if you specifically need a slightly more compact package and can justify the four-fold price premium for modest VHF improvement.

The ABBREE delivers better UHF performance at one-third the cost.