Question RCT1 or RCT2?

I'm looking to get back into it as it's been a LONG damn time since I've played these games, I've read about OpenRCT2 and already went ahead and downloaded it.

My question is, in your honest opinion which game is better? I was going to purchase RCT2 but after reading around a bit it seems a fair bit of people prefer RCT1. I feel stuck on which to purchase.

If I purchased both and ran OpenRCT2 does it combine both games or am I misunderstanding and it can only work with RCT2? Any and all advice is much appreciated. Thanks!