We are setting up a all-band radio in an emergency com center that's intended most for amateur band use, but since its' for emergency use will also be used in the public safety bands; (150-170)MHz, (470-512)MHz, (700/800)MHz, and possibly others if needed. We have a small tower to mount the antenna to. The person in charge of the project wanted to use a PCTEL PCTWSLMR Multiband mobile antenna, since its commonly used in the local police vehicles that are outfitted with this radio. I'm against using a mobile antenna on a tower, so researching I found TELEWAVE ANT280S Discone antenna. I was told that we shouldn't use a Discone for transmit because of poor performance, but I'm not sure why. The mobile antenna lists gain as unity and VSWR as 2:1 typical and 2.5:1 max. The specs for the discone are unity gain with a maximum VSWR or 1.5:1 accross 132 Mhz - 3 GHz. So I don't understand why the discone would be considered inferior to the mobile antenna in this case. I know that common wisdom is that a discone is for scanner type applications, but it seems that in this case that it would out perform the "out of the box" solution, which in this case is the Multiband mobile antenna.
So, is there anything I'm overlooking here as to why I shouldn't just use the discone for TX/RX applications? Thanks