Having trouble finding comparison of photon and core

I just discovered that the core has three serial i/o channels :open_mouth:
After I found that I started wondering really what are the differences in hardware and firmware between the core and the photon. Does the photon have even more serial channels? I know it holds more code and has more ram but is it lower power?
I came looking for a pretty breakdown of the features of both but have found nothing.
Is there a nice chart or table or diagram or detailed list of some sort?