Two years is huge in technology and digital cameras are not different. Over the last year, mirrorless ones advanced by leaps and bounds, making the original 2013 edition, noticeably out-date.
We just published at Neocamera the most complete and up to data Mirrorless Camera Buying Guide available. Now fully updated mid-march 2015. Checkout the 2015 Mirrorless Camera Buying Guide right now!
There are plenty of extensive review of mirrorless digital cameras published at Neocamera. Many of them are quite recent and they include flagship models from most camera makers. Here is the complete and always full-to-date list or mirrorless reviews.