As I said. I don't know your current uses. Being completely in the dark. I can only give generalizations. I'd estimate for 90% of computer users. They'd never notice the difference between a Core i3 and Core i9. As they don't do anything which will max out the i3. If you don't do anything which taxes a CPU. More cores and higher clock speeds just means more CPU resources sitting at idle.
Now if you are doing tasks which are not only CPU intensive. That those tasks are also heavily multi-threaded or you do heavy multi-tasking. Then you will notice a difference. Most tasks will only use one to two threads. Some up to four. In those instances a Core i5 6600K will beat any Ryzen. If it is something which can fully utilize eight or more threads. The Ryzen will do better.
Very few games can do this. Mainly it is workstation tasks. Looking at Toms Hardware review of the Ryzen 1600. It shines in the areas of Rendering, Encoding/Decoding and Encryption/Decryption. I'm sure there are other tasks. Currently it is a narrow scope of use cases where one can take full advantage of a Ryzen CPU.