Ek4 holds better value, dc2 have projector headlights, both have sunroof, B16A2 more fun, B18C2 has more torque, DC2R steering wheels are cheaper and more abundant then EK9 wheels. Both are 4x100. Ek4 is updated chasis vs dc2 which is based on EG.

Comes down to condition, price and what shape you like...