Designer of the Atari 800 (TIA, GITA, ANTIC) = Designer of the Amiga 1000 (Lorraine).
That is one of the bizarre ironies of the Amiga story; Commodore basically stole Atari's computer out from under them and Atari slapped together a less capable but quite-a-lot-cheaper-to-build knockoff to try to steal their thunder/get revenge; the positions they'd been in during the C64/800xl war were almost perfectly reversed. (And in the end they probably ended up killing each other rather than doing any material damage to Apple or IBM.)
a home computer built for the masses.
Of course, by 1990 sales figures suggest that the motherboard in the majority of home computers being sold probably looked more like something from this ad than either a Mac Classic or an Amiga:
