I could be wrong, but I think larger ADAs have a lower noise figure because the noise figure is referenced to full power. If it was referenced to 1 Watt, you could compare one model with another. Referenced to full power, I'd have to do some math to compare. Unfortunately I haven't had coffee yet today. I have a rule that says no math, physics or chemistry before coffee.
A-LFR/1000-8 & 2/500v4x2
Air Force, Freedom