Is all mk4 Escort aftermarket springs & shocks from the likes of Spax, Koni, Cobra, H&R etc etc all interchangeable between models?

I have a 1.4 mk4 but the options are limited for this spacific car fit where as if i could include rs turbo or xr3i gear id have a lot more scope to choose from.

Why do they list different model fit springs & shocks? Is it all to do with engine weights or are the suspension components on the car different per engine and spec ?