You are aware that TRS2006 only uses one core and doesn't dump as much processing down to the GPU as some of the later versions. If you're looking for the best performance running the same hardware, assets and viewing distances then TS12 is probably the optimum one unless you have a GTX 970 or GTX 980 when TANE is the most efficient. Don't confuse low poly assets with a TRS2006 build number with efficiency on hardware, the later version should run the earlier assets but more efficiently.