I have been searching with Google to find any discussions about the quality of video produced by AVerMedia cards when compared to GeoVision cards.

I have not found much to read.

I am particularly interested in head to head comparisons....such as the AVernv3000 directly compared to the GV-600 and of the AVernv5000 directly compared to the GV-800.

Any comments would be most welcome. Especially discussing color depth, crispness, rendering of detail and crispness.

I had a GV 600 and a NV500 running together using 3x different cameras with a splitter / amplifier, this was a test to see if there was any difference.
The only difference I found was, under low light conditions the NV 5000 was giving a better clearer,noise free image. The Geo. unit was running on V8.12 but maybe V8.2 might be better