Main difference on the 1.1, 1.3, 1.4 and 1.6 CVHs in the Fiesta and Escort were the brackets on top of them to mount the Turbo/EFI crossover pipe or the indution hose of the carb air filter box.
N/A MFIs didn't have them, they were plain.

And there were several other form in other cars and the Ford Motorsport one in the RS1600i