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Atari ST
,/* Atari Falcon */
While the Atari ST was less powerful than an Amiga 500, the Atari Falcon was more powerful than an Amiga 1200.
The Atari Falcon was a commercial failure with only about 12,000 units sold. [https://www.atari-forum.com/viewtopic.php?f=27&t=24769&p=311392#p311297 Source]
A Falcon040 model was in the works, with a 68040 CPU and a case similar to the PlayStation 2. But Atari cancelled the project.