2L 4 cylinder turbo vs 6 cylinder 2.5L non turbo?

I just have a small problem on the car I'm going to buy next. I I'm having problems choosing a evo or a skyline. I want the one that use less fuel. I love those cars because of their looks, so i won't be driving like a maniac. so im just wondering which car uses less fuel and why. Also if you can explain those 2 cars to me that would be great. Explain mean what ever you can tell me about them. remember to say what uses less fuel because thats the main answer im looking for. Cheers guys