having driven both i'd say they are very different cars
the evora feels like a baby esprit .. its a more grown up and bigger car
it rides better than the cayman and is more fluid and of course, isn't so generic looking inside and out
horses for courses
one thing's for sure though... Lotus do not lack pedigree. Take a look through the histroy books or drive more of their cars. They have a philosphy and cohesive feel or dna that runs though nearly all of their models. The evora feels like a true lotus and the moment you drive away in it you can feel how it relates to the elise, esprit, 340r etc.. Porsche on the other hand, in the struggle for profit, have lost their origins a little bit. For example, a 997 today sadly feels nothing like a 911 of yesteryear. A cayman, nothing like a 968.