What is simutrans?
It is a transport simulation game, as that's the theme of the entire forum (except the off-topic forum of course
is it better than openttd?
Simutrans people say yes, OpenTTD people say no. In short, you are asking a useless question. Each person has its own ranking of games. Also, I find 'better/worse' too one-dimensional, I'd say 'different'.
I suggest you give simutrans a try, and find out how you rank Simutrans vs OpenTTD.
Im thinking about trying it.
looks neat how u build your own airport ^^
That's the only way to find out how YOU like Simutrans (which, by extension of what I said above, has no meaning for anyone but you).