Agree that the caves are much nicer in the 2nd one, but the 1st makes more vertical use of the tank, which is aesthetically pleasing, since there doesn't seem to be much swimming in the upper areas. Between the two, I'd pick the 2nd and toss a few dithers/upper-level fish in there
Thanks! Its a 100 gallon, been set up for Africans a few years, and now I just switched over to South American. I have been planning on adding some upper level fish, whether it be a school of tetras, or something else, I'm not sure yet..