Another victim of marketing.
“LED” monitors are LCD monitors.
The LED just describes the backlighting. They use an array of LEDs behind the LCD panel to produce light, rather than flourescents which have for years been the norm.
Whether it’s better or worse depends on a million different variables.
Stay away from really thin LCD panels regardless, but particularly so with the LED-backlit panels.
Also note that while generally something you’d want to disable in the interest of stability for critical viewing, some LED-backlit displays do offer some form of dynamic contrast either globally or locally by dimming the LED backlighting based on the video APL.
This all being said $100-150 for a monitor is dirt cheap. You don’t always get what you pay for, but you DO have to pay for what you get. I wouldn’t expect much in the way of quality with either of those…
Regards,
Chris