The first one is good, as you said, It has all the correct vacuum lines and stuff to run specific things like idle up, and to tap into the rocker breather etc but I would think in an AE86 engine bay you would have some clearance issues on cyl. 4 with the trumpets/stacks.
The second one is ok, but requires a bit more of a customer setup, plumbing into it for various things is needed also, but gives more clearance