I spent a couple hours playing and I was paying close attention to the graphics.
Other then the few changes they mentioned in patch notes (grass tiles and such), I don't think they turned up resolution on anything. Every example I thought was more detail was simply re-hueing or re-contrasting. On the beetles, the re-contrasting simply brings out the faux-particle effects. Pixel-size comparison made this perfectly clear, but the point is sort of moot because they did make some changes that are actually improving the graphics. Perhaps they are making changes to certain files when they have a chance in preparation for switching everything over.
I located some KR images and they are way better then anything in the EC currently...well, most of them.
