After my Q80T got wrecked I replaced it with a Vizio PX75-G1, I decided to go with a cheaper set, in case it got wrecked again, the loss would sting less.
I can't tell how they compare calibrated, because I never got a chance to calibrate the Q80T, but I can say that I miss the anti glare filter. The Vizio does OK at anti-glare, but the Samsung filter is really special.
Out of the box, the Vizio comes with brighter shadows. To my eyes, it looks better 90% of the time, but 10% of the time the shadows look noisy or boosted somehow.
The Q80T really nailed local dimming when displaying text and other blocky angular content like user interfaces. I rarely noticed the FALD working when switching apps or navigating through menus. On the Vizio, the FALD is very noticeable in menus, but I could get used to it. FALD on both sets did great on real content.
I noticed zero DSE on the Q80T and I have noticed some DSE on the Vizio already in real content, that sucks.
Overall in terms of PQ each set has pros and cons, except the Vizio DSE. The Samsung anti-glare filter is what makes it a winner for me, but in the end I didn't think it was worth 80% more money (given the way higher than average risk a sword might go through my screen).
I don't think I'll be back in this thread very much but thought I would throw in my comparison.