Looking at those pics through an IPS monitor, the OLED does look better to me in almost all cases. But that doesn't come as a surprise, of course it's a cost saving measure to replace the OLED with an LCD for the new model, the whole purpose of OLED was to improve on other display technologies so of course OLED looks better, and I would bet that Sony wanted to use the Vita to drive forward a new display technology.
edit: Oh, and there's a lesson about what people expect out of video game hardware contained in the Vita's sales performance, perhaps it's games take precedent over premium hardware, perhaps it's price. Just like how computers are sold in all types of power levels and build qualities and such, the premium choice isn't always the one chosen by the mass consumer. But at $199 and compared to the 3DSXL, I personally see the tech as worth the price and when I do get a Vita it's going to be the OLED model. When I see the PS4 I see a damn good value in tech compared to the competition, and of course, excellent and desirable games along with that tech, they very much learned from the PS3 and Vita.
edit: Oh, and there's a lesson about what people expect out of video game hardware contained in the Vita's sales performance, perhaps it's games take precedent over premium hardware, perhaps it's price. Just like how computers are sold in all types of power levels and build qualities and such, the premium choice isn't always the one chosen by the mass consumer. But at $199 and compared to the 3DSXL, I personally see the tech as worth the price and when I do get a Vita it's going to be the OLED model. When I see the PS4 I see a damn good value in tech compared to the competition, and of course, excellent and desirable games along with that tech, they very much learned from the PS3 and Vita.