As someone who owns a SNES and a TG-16, I think I disagree. The TG-16 graphics really pop compared to the SNES.

The SNES can only render 256 simultaneous colours. The TG-16 could do twice that at 512. Its video processor was also full 16-bit.

I’m not sure where you’re getting that the video was the weakness of the TG-16. At the time, that was the Turbografx’s whole claim to fame in that it was superior graphically to the SNES.

Source: Old enough to remember the commercials and bought both consoles to compare like nerds did back then