LED TVs also use LCD panels with LED for back-lighting. So except black, all colours will look the same. In LED you get real richer black. Also, LED TVs are slimmer than LCD.
My personal opinion is LED TVs are better than LCD, but current price difference does not justify the advantages. So if budget is not a problem for you, go for LED TV. There is not going to be big difference even if you go for LCD.