help needed fp18g or greddy 18g turbo

[spyder_dsm]

well like the title said i need help with these two turbo. Which one is better then the other? and i know that the fp 18g bolts up to my manifold but what about the greddy 18g, does it bolt up to my mitsu manifold too or will it not?? reason why i'm asking is because my buddy has a greddy 18g turbo and he is selling it to me for a good price. any help will do and if this topic has been beaten to death I'm sorry couldn't find it anywhere. and thanks ahead of time. please help LOL.....