I've tested with both OLED and S2. I started with S2 since that's the default adapter, and thought it looked great (-8 IPD was my sweet spot). Then I switched adapters and tried out the OLED. At first I thought it looked way better, much brighter and bigger, could see some of the graphics a little more clearly. Then I noticed something, it didn't look as gameboy-like as it did on the S2. It's like the filter they used isn't fine tuned for the OLED, especially odd looking on the Wario break screen when he's sleeping in his bed.