I do not know if you are going for new or secondhand.
In UK....not sure about mainland Europe
Engines on new facelift Ecosport mid 2017 onwards are 1.0 petrol or 1.5 diesel EU6 (with adblue).
Pre -mid 2017 ..you could have 1.0 petrol or 1.5 petrol or 1.5 diesel EU5.
I see that you have read this thread below, hope it helped, Cheers Colin