This is clearly one of those cases where the lack of fundamental knowledge would render any test results useless. I don't intend that as an insult. I do intend that in a manner that would save you lots of time, trouble, and money, if only you would open up to what people are telling you. More below...
Every scanner reacts differently to every antenna.
I have found this out with my many home brews as well as factory antenna's.
So i am just looking to fine tune what antenna's work best and what freq's and what scanners receive better on what antenna's.
Test and tune as it's been called before.
I think you're misinterpreting some of your results, and in either case, a great deal more test equipment would be required to see if/how any particular antenna reacts differently to different receivers. Relative signal strength is not necessarily a good measure of how well a receiver or antenna is functioning. And any difference of how a particular receiver reacts to a particular antenna is highly unlikely to show itself in the form of an s meter reading. Low band reception on an 800 MHz antenna is going to stink, no matter what receiver you use. 800 MHz reception on that same 800 MHz antenna is going to show identical relative signal strength characteristics, regardless of which receiver you use, meaning what peaks it in one receiver, will peak it in another. A relative signal strength reading will show gain improvements on an antenna, but it would be a pointless exercise to make that measurement with every receiver you have. The results would be the same.
Fine tuning a scanner to a antenna is the same as many many ham users do for their hobby as well as they spend hours and hours and big bucks some times to achieve the ultimate combination.
What is it you hope to adjust? The scanner, or the antenna? Scanners generally are going to have a broad band input stage that's not adjustable. You get what you get. A realistic difference to expect between different makes and models of scanners would be noise figure, as a function of frequency. Some scanners amy perform better at low band, for example, than another. A different scanner may perform better at 800. But this is nothing you can fix or adjust without a preamp. I would also add that optimum noise figure doesn't necessarily come with best match to the coax, or with highest gain i.e. strongest signal levels. But it IS the only thing that really matters in weak signal reception.
I just want to be able to see what my antennas are doing as far as receive goes.
and i have been told the RIGHT sillyscope will do the job, i was not told what sillyscope to use to see what i want to see, that's why i made this post.
Well, you were told wrong. An oscilloscope is SO not the right instrument to use. As suggested, a spectrum analyzer would do the job of measuring signal strength, but then, it's a stand alone instrument, and wouldn't make any distinction between receivers.
What you need is an antenna test range with a calibrated signal source, and a means of measuring antenna gain and signal to noise ratio across the test range. You also need a noise figure meter, and a calibrated noise source.
Or, you could settle on something that makes sense, like a meter that monitors AGC voltage on a receiver, and base your antenna experiments on that. But you've already discounted that idea, so I doubt we can help you.