G1X vs G15

G1X and G15: what are and the pros and cons of choosing one over the other? Among the few I've gathered - G1X is good in low light, G15 has better macro performance.

Can anyone talk about their AF? Are they any better than the EOS M?

And by the way would anybody know if the EOS M now has lens adapters aside from those for EF and EF-S lenses? Like adapters for screwtypes and Nikkors?

Thanks in advance for your answers.