All cameras are not created equal -- not even all EOS Ms. Sure, each of the four compact flavors may carry the same 18-megapixel APS-C CMOS sensor, 1, 040, 000-dot 3-inch touchscreen and arguably mediocre UI, but only one has a remotely premium shell.
Also on order for today is the NEX-VG30 -- the successor to the VG20 -- which offers many of the same features, but with a 16.1-megapixel APS-C CMOS sensor instead.