Ranked in these QuestionsQuestion Ranking
Pro EVF allows seeing an approximation of the end-result before you take the picture
Unlike an optical viewfinder that displays the same thing your eye sees, an electronic viewfinder shows what the camera sees.
Pro Latest generation mirrorless cameras are leading the way in AF accuracy and consistency
Pro Compact bodies
Con EVF introduces a delay over OVF
Con Less consistency across brands
As mirrorless cameras are relatively new, differences in capabilities and how they handle between various brands are much larger than those of DSLRs.