The cyberwonks will argue one type over another, but the rest of us can't tell enough of a difference to make buying one kind over another a sticking point when negotiating for a good deal. You will also hear a lot of static about the dot pitch, or DP, or the stripe pitch. They cannot be directly compared. Don't let the salesman blow smoke up you about this one. A good monitor has a dot pitch of around 0.28mm, but a slightly higher number isn't a reason to quit considering the monitor.
Dot pitch is only one consideration.
A refresh rate of 85 Hz is virtually flicker-free to the most discerning eye, but a rate as low as 72 Hz is perfectly acceptable. And a too-high refresh rate can degrade image quality. Right-click the desktop, choose Properties, Settings, and click on the Advanced button. Under the Adapter tab, you'll see a list of available refresh rates. If this doesn't work, you'll need to click the Change button and reinstall the monitor.