Hey there Arti,
During my time with ORCT (less than a month maybe) I have mainly focused on the RCT1 scenarios so far. The only cheats I use regularly in my games are the no breakdown cheats as they bother me a LOT. Not to save money on mechanics but I mean seriously, why the hell does a freakin' slide break down?? I still keep a few mechanics around. I have been playing the original RCT probably since it came out, especially the first dozen scenarios. Playing on ORCT I haven't found any measurable difference in gameplay, difficulty or whatsoever compared to the original. My pathways are always pretty wide spread and I rarely had the peeps complaining about the park being too crowded. Unless of course I forgot to reconnect some small bits leading away from my main attractions with the main paths with a few dozen peeps getting stuck on 4 piles of path.
But to answer your question, I do prefer the ORCT game with the breakdown cheat over the vanilla RCT and for me it is about equally likely to win scenarios on either version of the game.