NEX 7 vs EOS M

"This Canon EF-M 18-55mm IS STM is a very small zoom lens with superb optical performance. Don't take its superior optics for granted; the very similar looking Sony DT 18-55mm SAM and Sony NEX E 18-55mm OSS are awful by comparison. It's better than the EF-S Canon 18-55mm lenses, too."

http://www.kenrockwell.com/canon/eos-m/18-55mm-stm.htm