Later model evos will shed value...quickly!
I would personally go for the escos and tune that. The evo is a more modern car, and quite possibly quicker point to point, but a lot of it is down to driver at clubman levels.

The escos may appreciate in value...the evo will definately lose value.

As others have said, it depends what you want from the car. But I think Evos look pants to be honest.
Escort Cosworths still look mean as, and they were my dream car from back in the day so Im biased... hehe