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There are three parts that make up an imaging system (optically). The aperture, focal length and f/ratio. If any two of these change the third does as well.
Using my previous example, a 50mm @ F/4 has a clear aperture of 12.5mm. 100 of these have an effective clear aperture of 39.5mm (((12.5)^2)*10)^0.5. 39.3*1.26= 49.8mm (ive rounded off a few times).
Yours is slightly more complicated to calculate as you are dealing with different telescopes and cameras but the principle is the same. What it means is that over a two hour imaging period you would get about an extra 40% SNR increase over someone that only has one setup going for two hours.
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