I'm considering getting an after-market antenna for my new 2 m/70 cm HT and am trying to decide which of the two antennas I should get. My primary reason for considering an alternative antenna is improved RX/TX performance.
Both antennas in their specifications on the manufacturers web-site say following:
Maximum power: 10 W, gain 2.15 dBi, 1/4 wave on 2m, 1/2 wave on 70 cm, both have appropriate connector and impedance, both have specified SWR as less or equal to 1:1.5.
The only difference between them is that one antenna is 19 cm long and the other antenna is 36 cm long.
After doing some research on the internet, I've noticed that a large number of HT antennas have extremely similar technical specifications, with only difference being the antenna length. I've also read very vague and general descriptions saying that longer HT antenna==better HT antenna.
So how do I determine which antenna is better based on provided information?
By the way, I want to keep the question as general as possible, so I didn't mention models until now, but they are Diamond SRH-701S and Diamond SRH-536.