OK, this is my field experience. I use RB711 so single chain only, on a tower with a lot of Radio and TV stations, some of them with Mega Watts of power so I guess its a pretty "noisy" place . The PtP link is with Signal levels around -60dB, Noise level -110 dB ??? as reported from RB711, 13km perfect LOS, ROS 4.17 to 5.5 all the same. Tested on various frequencies range from 5000 to 6000 MHz.
-with Nstreme: Initially link is OK, data rates 150/150Mbps, CCQ 90-100%, Bandwidth test shows around 100Mbits UDP. The problem comes when real traffic is passed, around 20-30Mbits of traffic, CCQ starts to drop below 50%, data rates also drop below 54Mbps, ping goes high and that's about it. No more than 30Mbits throughput.
-with NV2: Initially the same conditions as with Nstreme, data rates 135/135 Mbps. When real traffic is passed, CCQ also drops but stays around 60-70%, data rates 81/108 Mbps and around 60Mbits total throughput.
So NV2 performs better then Nstreme in this kind of "noisy" situation. The question is WHY?
When I applied diplexers on both sides, with 100MHz channel, so say only 5700-5800 MHz range is passed, everything else is heavily attenuated, the same link is now working with Nstreme with 90% CCQ, data rates 121/135Mbits, 80Mbps throughput. I haven't change anything, all the same, Routerboards, pigtails, antennas, cables only difference are applied filters.
I don't know, maybe I'm missing something here but that's the results from real traffic not UDP Bandwidth test.