The Sheikra trains have 8 seats per row, just like the oblivion trains. The only real difference is the body styling. on the front of the cars. I have not been able to find a good photo of them online.
The Original Dive Machine trains do have a station made for them so that they do not hit anything. The only problem was the animated queue gates had to be hidden because there was no was in SM1 to push them back.