In real life, how much better is E-M5 (vs. 1st gen)?

photobeans wrote:

believe it or not, your e-p1 at ISO 600 and below is just about as good as any modern entry level dslr. I know this because I shoot with a D5100 and it has an awesome APS-C sensor. Above ISO 640 is where the camera fails badly to compete. So, if you need to shoot higher ISOs, upgrade to the OM-D.

Also, the flip out screen and electronic viewfinder are very helpful.