The T670 SHOULD outperform the WTS but it doesn't. I had 2 of my customers with WTSs that demoed a T670 last year in tough wheat and could easily keep up, even pass it. Losses and sample were similar. The only mod to the WTSs was 20% power chips but the T670 is supposed to have 50 more hp anyway.
Both machines waste too much power on the chopper. It does a good job but at a cost. Put a Redekop kit in, free up 30-40 hp plus save on fuel, and these machines would be even better.
Both machines waste too much power on the chopper. It does a good job but at a cost. Put a Redekop kit in, free up 30-40 hp plus save on fuel, and these machines would be even better.