They're comparing camera processed JPEGs. Are you planning on shooting RAW? Because if so you should look for comparisons elsewhere. I was reading this review last night on imaging-resource, and they have comparisons between the K-3 and others (not the FUji X-E2) and there, the K-3 fares very well. They also explain the differences between the 24mp output of the K-3 and the 16mp of the K-5 IIs (same resolution of the Fuji X series) and they say basically that although the K-3 does slightly worse at higher ISOs it preforms better when the images are scaled down to 16mp and when printed, matches the IQ of the 16mp K-5 IIs at 6400 for an 8x10 print.
Pentax K-3 Review: Initial Test