Serious question here. I have not found any good comparisons on the internet. I know that the 5900X is all around a better CPU for blended workloads, especially with thermals taken into consideration. I currently have a 9900k running 5.1Ghz day to day with C states and Speed Step all working perfectly. Its a solid chip.
I am really liking the Zen 3 and appreciate that AMD has put out something very competitive and frankly the leader on the desktop. I am also itching for a new build in order to hand down my PC to my son, and his down the line to another. I tend to do builds based on keeping all the machines in the house capable of running most new games. So now is kind of the time.
That said, most of my work is office based and web. I do not need the high end content creation capabilities. And I am concerned that if I upgrade I may actually lose gaming performance. I can play any game at an all core 5.1GHz on the 9900k, and I believe Zen 3 may top out at 4.4-4.6 all core. So what is faster for gaming in this scenario. I'd love a new AMD system....but do not want to go backwards. Without OC, Zen 3 is the clear leader...but I haven't seen many good OC head to head comparisons.