The OLED model has slightly better performance due to a newer version of the same APU. So it's not just the screen that is better.
That said, I have a very early LCD model I love. The OLED is not a big enough upgrade for me to consider buying it. But if I were buying new I would get an OLED.
The only OLED feature I couldn't go back to missing is the Wake Over Bluetooth functionality that lets you use your controller to bring up the system. Not huge for some, but when you've got a docked setup it's heaps more convenient.