Okay i guess, i don't really know the difference between the technical names. But if you say led, is the screen that uses a bunch of tiny light bulbs or something to display the image as appose to that liquid stuff like some HD monitors right?
Sorry, i really guess i am bad at this, i usually just care if the stuff is in HD or not, but lately lots of people seem to be interested in screens of 3DS and Vita talking about IPS and stuff i don't get.
Basically:
TN = The type of display the 3DS is supposed to have. The viewing angles are not that good, if you're looking at it from the sides the colors will look washed out.
IPS = The type of display the Vita 2000 (and some 3DSes) have. The colors will look the same from all viewing angles (well, not *all*, but iirc the max is 178°, so almost all).
LCD (Liquid Crystal Display) = Screen made of Liquid Crystals (thx sherlock). By itself, the screen will not emit any light (like the original GBA), that's why today all LCD screens are backlit. This type of screen is used in the 3DS, the Vita 2000, iOS devices, and most TV and computer screens.
OLED = A display made of LEDs. Each pixel emits its own light. This type of display is usually considered better than LCD, color-wise. Used by high quality Samsung/Android smartphones.
On the Vita 2000, though a lot of people say so, the LCD screen isn't bad at all, quite the opposite. It's even pretty good when you look at the Vita's price. While the colors may look better on the 1000, the screen actually suffers from screen burns, and the LCD's durability is better. Sure, if you hold the two models side by side, you'll think the 1000 is better, but if you just get the 2000, you won't notice anything.
I have (actually, had) both, and the only thing I like more on the 1000 is the overall design.