The Samsung Q70/Q70R QLED is much better than the Samsung TU8000. The contrast ratio is a bit better and it has a local dimming feature to further deepen any blacks. The overall picture quality is better on the Q70R, it can get much brighter, the response time is much quicker, it supports FreeSync variable refresh rate technology, and it can remove judder from all sources. Meanwhile the TU8000 has somewhat better black uniformity.