Wireless Performance - Comparative
2.4 GHz downlink shows a slower start for the V2, then improvement in the teen attenuation values. A plateau in the 27 to 39 dB range lets it stay above the V1 as signal levels drop and also stay connected until the 57 dB attenuation test. Aside from its characteristic dip in the lower attenuation value range, the ASUS' throughput stays significantly above both versions of the TEW-812DRU from 27 dB upward.
2.4 GHz Downlink Throughput vs. Attenuation
The 2.4 GHz uplink plot shows both the V1 and V2 more well-behaved and a definite advantage for the V2. But both are easily once again outperformed by the ASUS.
2.4 GHz Uplink Throughput vs. Attenuation
The 5 GHz downlink profile shows all three products' throughput starting to drop almost immediately as attenuation ramps up. The V2, however, stays below the V1 for most of its run, popping into the lead only for the last three test points.
5 GHz Downlink Throughput vs. Attenuation
The same trend is also seen in the 5 GHz uplink profile, except the V2 moves above the V1's throughput two tests earlier.
5 GHz Uplink Throughput vs. Attenuation
The Router Ranker Performance Summary shows the V2 ranked eighth among AC1750 class routers, right above the original TEW-812DRU in the ninth rank slot. The only sub-rank where the V1 does better than the V2 is for Maximum Wireless throughput, where its 5 GHz up and downlink maximums outpace the V2's.
TRENDnet TEW-812DRUV2 Router Ranking Summary
In all, there really isn't much to recommend the TEW-812DRUV2 over the V1, not that you'll have much choice. The V2 will phase in automatically as V1 inventory is sold off. The only way you'll be able to tell what you are getting online is to look for a USB 3.0 port reference in the product description. But given that descriptions often don't accurately describe the product you get, you might end up with a V1 anyway. TRENDnet tells me that most of the V1's should be gone by the end of January 2014.
So if you really think the TEW-812DRUV2 is the AC1750 class router for you, you might want to wait until then if you're buying online. But check the Router Ranker before you buy. Prices continue to move around and there are better performing AC1750 routers for about the same or less.