Default [Q] Samsung Captivate

My dad has a Samsung captivate(SGH-i897)(captivatemtd)(AT&T version of the original Galaxy S), currently running an official cm11 build.
I see that you don't support it (don't blame ya), but I also see that you support the Galaxy S (i9000).
The specs look identical to me... is it possible that the Galaxy S build would work on his Captivate?

Sorry, I'm new to this.

Thanks though!