I belive the roller coaster came later. I believe Railroad Tycoon II came out maybe around 1995, and Railroad Tycoon maybe 1990. I never tried the roller coaster Tycoon.

Railroad Tycoon was great when it was released, but I'm a bit afraid trying out old games, they often does not live up to the good old memories. Now that I have a family and a job and a boat and lots of other things going on, I rarely have time for gaming.