The top is an IAK (based on the lathing style) and the bottom is from the Z Series. These were released in 1987 in 13" diameter, and the 14" diameter in 1988. I wasn't sure when I wrote up my page
http://black.net.nz/avedis/NAK.html#EAK
if there were going to be K/Z tops which were EAKs rather than IAKs, so in my discussion I left it as "are these counted as EAKs?". The 13" size began during the changeover from EAK to IAK. Since that was written (2017) I would say that all the new models introduced after the Light Ride (1985) are not EAKs sensu stricto. With hindsight the whole EAK/IAK distinction works on just those models which were pre 1986.
Hope that helps.