Hi,
Just some quotes from Wikipedia:
"The tailfin of a Tornado was used as the basis of the unit fitted the EAP in order to reduce cost."
"The initial definition of what became the
Eurofighter project started soon after the EAP project was initiated. Without the research input from ACA and EAP, the Eurofighter would not have been possible. While the similarity between the EAP and the Eurofighter/Typhoon is striking there are some important differences; the cranked delta wings of the EAP have been replaced with a straight delta, the size of the fin has been much reduced and the rectangular intake of the prototype has been replaced with one with a "smiling" configuration."
A main difference between these aircrafts is that the Tornado has a variable-sweep wing to decrease drag at low altitude, high speed flight. A sweep-back wing has lower area better for high speeds, a sweep-forward wing is better for low speeds.
About the delta wing, the EAP had a cranked delta wing to reduce drag, increase lift and fly at low speeds while the Typhoon has a straight delta wing in combination with the canard.
The Typhoon foreplanes or canard, this flight control device provides pitch control, helps to increase lift and directs airflow to the wings reducing turbulence air (delta wings suffer flow separation at high angle of attack).
Hope I am right.
Regards