Couple of notes -
There is a 40 W version and a 25 W version of VHF M1225. The M33 is a 25 W radio. The M43 is a 40 W radio. They are not the same, so pay attention when you're buying one.
Never tried 440.
Taking a high power mobile and running it at lower power, unless it's designed to do that (they might be, I've never tried), might create some problems as far as spurious emissions and power consumption. The amplifier might not be stable if it's not biased as designed.