Went through the part catalog tonight. Unfortunately they are definitely different on basis of part numbers. There are different categories of screens: tempered, tempered tinted, zone tempered tinted, laminated, laminated tinted. And a couple of differences in thickness. Comparing like with like between KE10/11/16/18 vs KE15/17, the part numbers are different. To further confirm it, the seals are different part numbers between the two groups also..
Of interest with the discussion regarding quality of aftermarket seals, there are different part numbers for seals dependent on glass thickness.
Would be very interesting to know what the actual dimensional differences are.