RollerCoaster Tycoon 2 is better.
What I find seriously lacking is that the game seems to rely the most on the computer mouse. With the previous RollerCoaster games, you could use both the keyboard and the mouse interchangabley. Another thing that I don't like about this game is how the sim workers seem to be lazy and not want to work, so you have to displine them, taking you away from building more rides that will attract people to the park you're working on. In addition to that, I find the instructions to be rather confusing to read and understand.
In all, the only improvement to this game is the graphics. I would highly recommend not buying this installment to the RollerCoaster Tycoon gaming series.