Yes they are similar, I wanted to use a Mk2 rack and also had a set of Mk2 2lt struts with new springs and shocks sitting around. Mk2 also has slightly bigger brakes but wasnt sure if it was enough to stop me fitting the 12" rims back on - currently has 13"s on it.
All my other Escorts are Mk2s so made sense to stick with Mk2 bits where not obvious.