Not even close? Let's see...
The AS code used KISS code as a framework. This was quite apparent because early versions of AS code had the exact same sound effects as KISS.
Both center and right ramps are very similar
The jet bumper layout is similar, except there's 3, not 4
There is a scoop, but it was moved to the left
The toybox replaces the starchild area
The lock channel/mini playfield replaces Gene's head
The spinner is the same
I don't care one way or another really. AS was designed very similar to KISS for one reason or another. It's certainly not a unique layout like TWD. I don't think JB would scratch design AS to be the same as KISS, so perhaps he just started with the KISS cad drawing and changed things accordingly. Time and budget constraints perhaps? Just postulating openly...
Rob