A native F18a with VGA and HDMI output will look much better then composite video. Even when composite video is upscaled to 1080i, 1080P, or 4K, the picture really is not going to look any better. Upscaling adds artifacts to the picture sometimes. The software on the ColecoVision/ADAM is native 256 x 192. However when a F18a is installed in a ADAM computer, with specially designed software the ADAM computer could operate in 80 column mode and have much better graphics quality with the F18a's HDMI output.
The Texas Instruments computer appears to be more popular for program developers. The F18a has better resolution, graphics, and can operate in 80 column mode on that computer. As far as I am aware no ADAM user so far has made a special program to access the advanced capabilities of the F18a. Very few ADAM and ColecoVision owners own a F18a. Now if there was a external plug in card of the F18a for the ColecoVision/ADAM, then making a special ADAM or ColecoVision game for the F18a would be more popular. There are companies working on a ColecoVision II or ColecoVision clone with a advanced video chip with HDMI output. If those products become a reality, maybe game developers might make special ColecoVision games with more resoultion and improved graphics, but with the negative being one is not able to run those new advanved games on the original 1982 ColecoVision's.
Edited by HDTV1080P, Sun Dec 17, 2017 3:08 PM.