E-m5 vs. Sony Rx1

Thank you for your thoughts. I'm acutally not lost. I have pretty well-defined needs.

I use a camera for many things. When I want to shoot long distance, I use a Panasonic 45-175. When I want to go into a P&S mode, I use the e-m5 with one of these three lenses (20,25 or 45).

But it is really not small enough.  Though the image quality is very good with any of them. However, since I want smaller, and I see the RX1 has a full frame sensor, the question was how much better the IQ would be.