I have had both a 13B Jport 1200 ute and a ca18det 1200 coupe
The Ca18det was better in every way: power,realiability,economy,legality instalatiopn and not to menchin noise and police atraction. Yes you can get more power from a 13b turbo but in my opinion pretty $$$ for a decent engine build box engine managment ect. I would stick with the nissan 4 banger if I where you.