There's some additional issues with the piece this article quotes, in addition to the ones he mentions:
- When mentioning the 128, they don't even consider VDC mode, which did (on the flat 128, anyway) have a 640x200 monochrome mode. It didn't get used much and Commodore didn't really acknowledge it, but it was there.
- The 1.8MHz clock rate for the Atari 8-bits depended on how much it got interrupted by the video hardware.
- When mentioning the 128, they don't even consider VDC mode, which did (on the flat 128, anyway) have a 640x200 monochrome mode. It didn't get used much and Commodore didn't really acknowledge it, but it was there.
- The 1.8MHz clock rate for the Atari 8-bits depended on how much it got interrupted by the video hardware.
- The color comparison doesn't include Amiga HAM.