Yes, they all have pretty much the same bench test sensitivity specs but what differs are when you have a demanding RF situation where it matters how well it will handle interfering neigbouring frequencies. And with SDS scanners it might not need to be an adjacent frequency as they could be affected by signals several MHz away. It all depends of your own unique RF enviroment and some people will say that they have no problems at all while others have huge issues and both insists that the other person are wrong.
/Ubbe
You touch on an often overlooked situation..."unique RF environment". What I have learned is that no matter the scanner type, the front ends are easily subjected to reception issues due to overall channel or spectrum power. Case in point...I have a decent setup here, but was having VHF high band reception issues (very poor sensitivity) across the band. Low band, UHF, 700,800,900 Mhz had no issues. Just VHF high. I grabbed a HP spectrum analyzer to see why. It was an easy find. A local full powered TV transmitter broadcasting on Channel 10 digital was by far blowing the band out of the water. My antennas are line of sight to this transmitter. It would not cause issues with my RF limiter, but overwhelmed the scanners. So, I had to fabricate a notch filter ( I decided 8 MHz wide) and was able to notch this offending transmitter more than 120 dB from before I started with minimal insertion loss to my desired listening VHF frequencies. As a aside, my high band Motorola radios ere unaffected by this TV transmitter. Being a retired CATV headend engineer, this was easy to build. Now, I can hear stuff over 100 miles or more away easily on high band.
So, the term "unique RF environment" rings so, so true. Even f you don't think you have a problem, and you can access an analyzer, by all means do it...it cannot hurt
