The SanDisk Ultra 3D is the same drive as the WD Blue 3D (WD owns both brands) and it's a very respectable SATA SSD that I'd easily recommend (same goes for the Crucial MX500).
The Samsung 860 QVO is sketchy in a number of ways, from its regular performance to its performance as it's filled up to its write endurance. QLC memory, or at least the design currently being used by Samsung, does not seem to be ready. If QVO drives were being sold at a significant discount compared to the 3 drives I mentioned before then there might at least be some reason to consider them as storage drives. But in my market they are not (don't know what prices you have), and for the same or similar price there isn't any good reason to go with a markedly worse drive.
Under no circumstance should you look at getting a qlc ssd for the situation you are in now. At 50% capacity, they drop speed to slower than a hdd. All my friends who went against my advice regret doing so. Stick with tlc for the time being until they fix the issues with qlc.
