Comet SBB-224NMO Tri-Band Mobile vs HYS Pre-Tuned Dual-Band NMO Magnetic Mount

The Comet SBB-224 is the stronger performer here, with realistic gains of 3.2 to 5.0 dBi across three bands, while the HYS is limited to two bands with gains of 2.0 dBi on VHF and 4.7 dBi on UHF. The Comet's electrical lengths are better optimized: its half-wave VHF section needs no ground plane, and its 5/8-wave and multi-wavelength sections on 1.25m and UHF deliver solid performance. The HYS compromises on VHF with a quarter-wave design that delivers only 2.0 dBi, a meaningful weakness if you use that band seriously.

The single most important differentiator is tri-band versus dual-band coverage. The Comet includes 1.25m, which many operators value; the HYS does not.

The Comet SBB-224 should go to operators who want tri-band capability and better VHF performance, even if the antenna is longer. The HYS should appeal only to budget-conscious buyers who rarely use VHF or need a compact form factor.

Buy the Comet SBB-224. It costs twice as much but delivers meaningfully better electrical design across more bands. Owner reports on both are strong, and the RadioRanked scores are virtually tied, so the performance advantage justifies the price.