Difference between QLED and OLED TV

Want to know what is the difference between a QLED and OLED TV? Which among them better? Check out the opinion of our experts.

Recently, OLED and QLED televisions are gaining a lot of popularity in TV market.
What is the difference between a normal 4K Smart and OLED, QLED TV's? Looks like OLED television are expensive compared QLED. Does that mean OLED is better buying option?