Is Ryzen a good cpu choice for RPCS3?

2700X has latency issues between CCX module. All SPU cores are mapped to a single CCX due to latency issues on Ryzen.
8700K has TSX, AMD CPUs don't have TSX or any similar Instruction Set.

I don't know if there are any 2700X benchmarks, but 8700K is better.

Do you have a rough estimate of how much better is the 8700k (like percentage-wise with respect to frame rate/frame time)?

I am also building a new pc for gaming (new, old, and emulated games), and I'm trying to decide between the 2700x and the i7 8700k (or the upcoming i9 9900k). I was looking to play Metal Gear Peace Walker, and, if they (hopefully!) become fully playable, Red Dead Redemption and Resistance 3. I intend to pair the CPU with a 1080 ti. The displays would be a 3440x1440@120Hz monitor and a 4k TV.